Merge tag 'm68k-for-v6.7-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k

Pull m68k updates from Geert Uytterhoeven:

 - misc aesthetical improvements for the floating point emulator

 - remove the last user of strlcpy()

 - use kernel's generic libgcc functions

 - misc fixes for W=1 builds

 - misc indentation fixes

 - misc fixes and improvements

 - defconfig updates

* tag 'm68k-for-v6.7-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: (72 commits)
  m68k: lib: Include <linux/libgcc.h> for __muldi3()
  m68k: fpsp040: Fix indentation by 5 spaces
  m68k: Fix indentation by 2 or 5 spaces in <asm/page_mm.h>
  m68k: kernel: Fix indentation by 7 spaces in traps.c
  m68k: sun3: Fix indentation by 5 or 7 spaces
  m68k: Fix indentation by 7 spaces in <asm/io_mm.h>
  m68k: defconfig: Update virt_defconfig for v6.6-rc3
  m68k: defconfig: Update defconfigs for v6.6-rc1
  m68k: io: Mark mmio read addresses as const
  m68k: Replace GPL 2.0+ README.legal boilerplate with SPDX
  m68k: sun3: Change led_pattern[] to unsigned char
  m68k: Add missing types to asm/irq.h
  m68k: sun3/3x: Add and use "sun3.h"
  m68k: sun3x: Make dvma_print() static
  m68k: sun3x: Make sun3x_halt() static
  m68k: sun3x: Do not mark dvma_map_iommu() inline
  m68k: sun3x: Fix signature of sun3_leds()
  m68k: sun3: Make sun3_platform_init() static
  m68k: sun3: Make print_pte() static
  m68k: sun3: Annotate prom_printf() with __printf()
  ...

109 files changed, 634 insertions, 677 deletions

diff --git a/arch/m68k/68000/entry.S b/arch/m68k/68000/entry.S
index 7d63e2f1555a..72e95663b62f 100644
--- a/arch/m68k/68000/entry.S
+++ b/arch/m68k/68000/entry.S
@@ -1,12 +1,9 @@
-/*
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ *
  *  entry.S -- non-mmu 68000 interrupt and exception entry points
  *
  *  Copyright (C) 1991, 1992  Linus Torvalds
  *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file README.legal in the main directory of this archive
- * for more details.
- *
  * Linux/m68k support by Hamish Macdonald
  */
 
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 3e318bf9504c..3e96486d9528 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -19,6 +19,9 @@ config M68K
 	select GENERIC_CPU_DEVICES
 	select GENERIC_IOMAP
 	select GENERIC_IRQ_SHOW
+	select GENERIC_LIB_ASHLDI3
+	select GENERIC_LIB_ASHRDI3
+	select GENERIC_LIB_LSHRDI3
 	select HAS_IOPORT if PCI || ISA || ATARI_ROM_ISA
 	select HAVE_ARCH_SECCOMP
 	select HAVE_ARCH_SECCOMP_FILTER
diff --git a/arch/m68k/amiga/amiga.h b/arch/m68k/amiga/amiga.h
new file mode 100644
index 000000000000..00392781442c
--- /dev/null
+++ b/arch/m68k/amiga/amiga.h
@@ -0,0 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/* amisound.c */
+void amiga_init_sound(void);
+void amiga_mksound(unsigned int hz, unsigned int ticks);
diff --git a/arch/m68k/amiga/amisound.c b/arch/m68k/amiga/amisound.c
index 442bdeee6bd7..714fe8ec6afa 100644
--- a/arch/m68k/amiga/amisound.c
+++ b/arch/m68k/amiga/amisound.c
@@ -16,6 +16,8 @@
 
 #include <asm/amigahw.h>
 
+#include "amiga.h"
+
 static unsigned short *snd_data;
 static const signed char sine_data[] = {
 	0,  39,  75,  103,  121,  127,  121,  103,  75,  39,
diff --git a/arch/m68k/amiga/config.c b/arch/m68k/amiga/config.c
index 3137b45750df..7791673e547b 100644
--- a/arch/m68k/amiga/config.c
+++ b/arch/m68k/amiga/config.c
@@ -39,6 +39,8 @@
 #include <asm/io.h>
 #include <asm/config.h>
 
+#include "amiga.h"
+
 static unsigned long amiga_model;
 
 unsigned long amiga_eclock;
@@ -96,9 +98,7 @@ static char amiga_model_name[13] = "Amiga ";
 static void amiga_sched_init(void);
 static void amiga_get_model(char *model);
 static void amiga_get_hardware_list(struct seq_file *m);
-extern void amiga_mksound(unsigned int count, unsigned int ticks);
 static void amiga_reset(void);
-extern void amiga_init_sound(void);
 static void amiga_mem_console_write(struct console *co, const char *b,
 				    unsigned int count);
 #ifdef CONFIG_HEARTBEAT
diff --git a/arch/m68k/amiga/pcmcia.c b/arch/m68k/amiga/pcmcia.c
index 7106f0c3639b..63cce6b590df 100644
--- a/arch/m68k/amiga/pcmcia.c
+++ b/arch/m68k/amiga/pcmcia.c
@@ -26,11 +26,10 @@ static unsigned char cfg_byte = GAYLE_CFG_0V|GAYLE_CFG_150NS;
 void pcmcia_reset(void)
 {
 	unsigned long reset_start_time = jiffies;
-	unsigned char b;
 
 	gayle_reset = 0x00;
 	while (time_before(jiffies, reset_start_time + 1*HZ/100));
-	b = gayle_reset;
+	READ_ONCE(gayle_reset);
 }
 EXPORT_SYMBOL(pcmcia_reset);
 
diff --git a/arch/m68k/apollo/apollo.h b/arch/m68k/apollo/apollo.h
new file mode 100644
index 000000000000..1fe9d856df30
--- /dev/null
+++ b/arch/m68k/apollo/apollo.h
@@ -0,0 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+/* dn_ints.c */
+void dn_init_IRQ(void);
diff --git a/arch/m68k/apollo/config.c b/arch/m68k/apollo/config.c
index 42a8b8e2b664..e161ecd76035 100644
--- a/arch/m68k/apollo/config.c
+++ b/arch/m68k/apollo/config.c
@@ -4,7 +4,6 @@
 #include <linux/kernel.h>
 #include <linux/mm.h>
 #include <linux/tty.h>
-#include <linux/console.h>
 #include <linux/rtc.h>
 #include <linux/vt_kern.h>
 #include <linux/interrupt.h>
@@ -18,6 +17,8 @@
 #include <asm/machdep.h>
 #include <asm/config.h>
 
+#include "apollo.h"
+
 u_long sio01_physaddr;
 u_long sio23_physaddr;
 u_long rtc_physaddr;
@@ -28,9 +29,8 @@ u_long timer_physaddr;
 u_long apollo_model;
 
 extern void dn_sched_init(void);
-extern void dn_init_IRQ(void);
 extern int dn_dummy_hwclk(int, struct rtc_time *);
-extern void dn_dummy_reset(void);
+static void dn_dummy_reset(void);
 #ifdef CONFIG_HEARTBEAT
 static void dn_heartbeat(int on);
 #endif
@@ -108,28 +108,7 @@ static void __init dn_setup_model(void)
 
 }
 
-int dn_serial_console_wait_key(struct console *co) {
-
-	while(!(sio01.srb_csrb & 1))
-		barrier();
-	return sio01.rhrb_thrb;
-}
-
-void dn_serial_console_write (struct console *co, const char *str,unsigned int count)
-{
-   while(count--) {
-	if (*str == '\n') {
-	sio01.rhrb_thrb = (unsigned char)'\r';
-	while (!(sio01.srb_csrb & 0x4))
-                ;
-	}
-    sio01.rhrb_thrb = (unsigned char)*str++;
-    while (!(sio01.srb_csrb & 0x4))
-            ;
-  }
-}
-
-void dn_serial_print (const char *str)
+static void dn_serial_print(const char *str)
 {
     while (*str) {
         if (*str == '\n') {
@@ -168,13 +147,13 @@ void __init config_apollo(void)
 
 irqreturn_t dn_timer_int(int irq, void *dev_id)
 {
-	volatile unsigned char x;
+	unsigned char *at = (unsigned char *)apollo_timer;
 
 	legacy_timer_tick(1);
 	timer_heartbeat();
 
-	x = *(volatile unsigned char *)(apollo_timer + 3);
-	x = *(volatile unsigned char *)(apollo_timer + 5);
+	READ_ONCE(*(at + 3));
+	READ_ONCE(*(at + 5));
 
 	return IRQ_HANDLED;
 }
@@ -229,20 +208,14 @@ int dn_dummy_hwclk(int op, struct rtc_time *t) {
 
 }
 
-void dn_dummy_reset(void) {
-
+static void dn_dummy_reset(void)
+{
   dn_serial_print("The end !\n");
 
   for(;;);
 
 }
 
-void dn_dummy_waitbut(void) {
-
-  dn_serial_print("waitbut\n");
-
-}
-
 static void dn_get_model(char *model)
 {
     strcpy(model, "Apollo ");
diff --git a/arch/m68k/apollo/dn_ints.c b/arch/m68k/apollo/dn_ints.c
index 02cff7efc834..ba96a92f8f18 100644
--- a/arch/m68k/apollo/dn_ints.c
+++ b/arch/m68k/apollo/dn_ints.c
@@ -5,7 +5,9 @@
 #include <asm/traps.h>
 #include <asm/apollohw.h>
 
-unsigned int apollo_irq_startup(struct irq_data *data)
+#include "apollo.h"
+
+static unsigned int apollo_irq_startup(struct irq_data *data)
 {
 	unsigned int irq = data->irq;
 
@@ -16,7 +18,7 @@ unsigned int apollo_irq_startup(struct irq_data *data)
 	return 0;
 }
 
-void apollo_irq_shutdown(struct irq_data *data)
+static void apollo_irq_shutdown(struct irq_data *data)
 {
 	unsigned int irq = data->irq;
 
@@ -26,7 +28,7 @@ void apollo_irq_shutdown(struct irq_data *data)
 		*(volatile unsigned char *)(picb+1) |= (1 << (irq - 8));
 }
 
-void apollo_irq_eoi(struct irq_data *data)
+static void apollo_irq_eoi(struct irq_data *data)
 {
 	*(volatile unsigned char *)(pica) = 0x20;
 	*(volatile unsigned char *)(picb) = 0x20;
diff --git a/arch/m68k/atari/ataints.c b/arch/m68k/atari/ataints.c
index 56f02ea2c248..23256434191c 100644
--- a/arch/m68k/atari/ataints.c
+++ b/arch/m68k/atari/ataints.c
@@ -52,6 +52,7 @@
 #include <asm/entry.h>
 #include <asm/io.h>
 
+#include "atari.h"
 
 /*
  * Atari interrupt handling scheme:
@@ -81,8 +82,6 @@ __ALIGN_STR "\n\t"
 	"orw	#0x200,%sp@\n\t"	/* set saved ipl to 2 */
 	"rte");
 
-extern void atari_microwire_cmd(int cmd);
-
 static unsigned int atari_irq_startup(struct irq_data *data)
 {
 	unsigned int irq = data->irq;
diff --git a/arch/m68k/atari/atakeyb.c b/arch/m68k/atari/atakeyb.c
index 5e0e682f9c61..49a9a459bdf4 100644
--- a/arch/m68k/atari/atakeyb.c
+++ b/arch/m68k/atari/atakeyb.c
@@ -332,7 +332,7 @@ void ikbd_write(const char *str, int len)
 }
 
 /* Reset (without touching the clock) */
-void ikbd_reset(void)
+static void ikbd_reset(void)
 {
 	static const char cmd[2] = { 0x80, 0x01 };
 
diff --git a/arch/m68k/atari/atari.h b/arch/m68k/atari/atari.h
new file mode 100644
index 000000000000..494a03ddac3d
--- /dev/null
+++ b/arch/m68k/atari/atari.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+struct rtc_time;
+
+/* ataints.c */
+void atari_init_IRQ(void);
+
+/* atasound.c */
+void atari_microwire_cmd(int cmd);
+void atari_mksound(unsigned int hz, unsigned int ticks);
+
+/* time.c */
+void atari_sched_init(void);
+int atari_mste_hwclk(int op, struct rtc_time *t);
+int atari_tt_hwclk(int op, struct rtc_time *t);
diff --git a/arch/m68k/atari/atasound.c b/arch/m68k/atari/atasound.c
index a8724d998c39..c38ef0e6078e 100644
--- a/arch/m68k/atari/atasound.c
+++ b/arch/m68k/atari/atasound.c
@@ -28,6 +28,7 @@
 #include <asm/irq.h>
 #include <asm/atariints.h>
 
+#include "atari.h"
 
 /*
  * stuff from the old atasound.c
diff --git a/arch/m68k/atari/config.c b/arch/m68k/atari/config.c
index 38a7c0578105..b48a0606a000 100644
--- a/arch/m68k/atari/config.c
+++ b/arch/m68k/atari/config.c
@@ -48,6 +48,8 @@
 #include <asm/io.h>
 #include <asm/config.h>
 
+#include "atari.h"
+
 u_long atari_mch_cookie;
 EXPORT_SYMBOL(atari_mch_cookie);
 
@@ -69,19 +71,10 @@ int atari_rtc_year_offset;
 static void atari_reset(void);
 static void atari_get_model(char *model);
 static void atari_get_hardware_list(struct seq_file *m);
-
-/* atari specific irq functions */
-extern void atari_init_IRQ (void);
-extern void atari_mksound(unsigned int count, unsigned int ticks);
 #ifdef CONFIG_HEARTBEAT
 static void atari_heartbeat(int on);
 #endif
 
-/* atari specific timer functions (in time.c) */
-extern void atari_sched_init(void);
-extern int atari_mste_hwclk (int, struct rtc_time *);
-extern int atari_tt_hwclk (int, struct rtc_time *);
-
 /* ++roman: This is a more elaborate test for an SCC chip, since the plain
  * Medusa board generates DTACK at the SCC's standard addresses, but a SCC
  * board in the Medusa is possible. Also, the addresses where the ST_ESCC
@@ -880,7 +873,7 @@ static const struct resource atari_falconide_rsrc[] __initconst = {
 	DEFINE_RES_MEM(FALCON_IDE_BASE + 0x38, 2),
 };
 
-int __init atari_platform_init(void)
+static int __init atari_platform_init(void)
 {
 	struct platform_device *pdev;
 	int rv = 0;
diff --git a/arch/m68k/atari/stdma.c b/arch/m68k/atari/stdma.c
index ce6818eff75e..155fefff19b0 100644
--- a/arch/m68k/atari/stdma.c
+++ b/arch/m68k/atari/stdma.c
@@ -61,6 +61,7 @@ static irqreturn_t stdma_int (int irq, void *dummy);
 /**
  * stdma_try_lock - attempt to acquire ST DMA interrupt "lock"
  * @handler: interrupt handler to use after acquisition
+ * @data: cookie passed to the interrupt handler function
  *
  * Returns !0 if lock was acquired; otherwise 0.
  */
diff --git a/arch/m68k/atari/stram.c b/arch/m68k/atari/stram.c
index ce79b322a99c..922e53bcb853 100644
--- a/arch/m68k/atari/stram.c
+++ b/arch/m68k/atari/stram.c
@@ -115,7 +115,7 @@ void __init atari_stram_reserve_pages(void *start_mem)
  * This function is called as arch initcall to reserve the pages needed for
  * ST-RAM management, if the kernel does not reside in ST-RAM.
  */
-int __init atari_stram_map_pages(void)
+static int __init atari_stram_map_pages(void)
 {
 	if (!kernel_in_stram) {
 		/*
diff --git a/arch/m68k/atari/time.c b/arch/m68k/atari/time.c
index 7e44d0e9d0f8..3453c6dc6b41 100644
--- a/arch/m68k/atari/time.c
+++ b/arch/m68k/atari/time.c
@@ -23,6 +23,8 @@
 #include <asm/atariints.h>
 #include <asm/machdep.h>
 
+#include "atari.h"
+
 DEFINE_SPINLOCK(rtc_lock);
 EXPORT_SYMBOL_GPL(rtc_lock);
 
diff --git a/arch/m68k/bvme6000/config.c b/arch/m68k/bvme6000/config.c
index 3a1d90e399e0..8a2ee69a09f6 100644
--- a/arch/m68k/bvme6000/config.c
+++ b/arch/m68k/bvme6000/config.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  arch/m68k/bvme6000/config.c
  *
@@ -8,10 +9,6 @@
  *  linux/amiga/config.c
  *
  *  Copyright (C) 1993 Hamish Macdonald
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file README.legal in the main directory of this archive
- * for more details.
  */
 
 #include <linux/types.h>
@@ -130,7 +127,7 @@ void __init config_bvme6000(void)
 }
 
 
-irqreturn_t bvme6000_abort_int (int irq, void *dev_id)
+static irqreturn_t bvme6000_abort_int(int irq, void *dev_id)
 {
         unsigned long *new = (unsigned long *)vectors;
         unsigned long *old = (unsigned long *)0xf8000000;
diff --git a/arch/m68k/coldfire/entry.S b/arch/m68k/coldfire/entry.S
index 35104c5417ff..4ea08336e2fb 100644
--- a/arch/m68k/coldfire/entry.S
+++ b/arch/m68k/coldfire/entry.S
@@ -1,4 +1,5 @@
-/*
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ *
  *  entry.S  -- interrupt and exception processing for ColdFire
  *
  *  Copyright (C) 1999-2007, Greg Ungerer (gerg@snapgear.com)
@@ -13,10 +14,6 @@
  *
  *  Copyright (C) 1991, 1992  Linus Torvalds
  *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file README.legal in the main directory of this archive
- * for more details.
- *
  * Linux/m68k support by Hamish Macdonald
  *
  * 68060 fixes by Jesper Skov
diff --git a/arch/m68k/configs/amiga_defconfig b/arch/m68k/configs/amiga_defconfig
index 6deb8faa564b..7e6b74b6eecd 100644
--- a/arch/m68k/configs/amiga_defconfig
+++ b/arch/m68k/configs/amiga_defconfig
@@ -299,6 +299,7 @@ CONFIG_NET_IFE=m
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_TEST_ASYNC_DRIVER_PROBE=m
+CONFIG_DM_KUNIT_TEST=m
 CONFIG_CONNECTOR=m
 CONFIG_PARPORT=m
 CONFIG_PARPORT_AMIGA=m
diff --git a/arch/m68k/configs/apollo_defconfig b/arch/m68k/configs/apollo_defconfig
index 802c161827f4..0b403e2efcd5 100644
--- a/arch/m68k/configs/apollo_defconfig
+++ b/arch/m68k/configs/apollo_defconfig
@@ -295,6 +295,7 @@ CONFIG_NET_IFE=m
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_TEST_ASYNC_DRIVER_PROBE=m
+CONFIG_DM_KUNIT_TEST=m
 CONFIG_CONNECTOR=m
 CONFIG_ZRAM=m
 CONFIG_BLK_DEV_LOOP=y
@@ -568,6 +569,7 @@ CONFIG_CRYPTO_USER_API_AEAD=m
 CONFIG_PRIME_NUMBERS=m
 CONFIG_CRC32_SELFTEST=m
 CONFIG_XZ_DEC_TEST=m
+CONFIG_GLOB_SELFTEST=m
 # CONFIG_SECTION_MISMATCH_WARN_ONLY is not set
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_TEST_LOCKUP=m
diff --git a/arch/m68k/configs/atari_defconfig b/arch/m68k/configs/atari_defconfig
index 2cb3d755873b..57aac3f4b001 100644
--- a/arch/m68k/configs/atari_defconfig
+++ b/arch/m68k/configs/atari_defconfig
@@ -302,6 +302,7 @@ CONFIG_NET_IFE=m
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_TEST_ASYNC_DRIVER_PROBE=m
+CONFIG_DM_KUNIT_TEST=m
 CONFIG_CONNECTOR=m
 CONFIG_PARPORT=m
 CONFIG_PARPORT_ATARI=m
diff --git a/arch/m68k/configs/bvme6000_defconfig b/arch/m68k/configs/bvme6000_defconfig
index b13552caa6b3..3c160636a2e9 100644
--- a/arch/m68k/configs/bvme6000_defconfig
+++ b/arch/m68k/configs/bvme6000_defconfig
@@ -292,6 +292,7 @@ CONFIG_NET_IFE=m
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_TEST_ASYNC_DRIVER_PROBE=m
+CONFIG_DM_KUNIT_TEST=m
 CONFIG_CONNECTOR=m
 CONFIG_ZRAM=m
 CONFIG_BLK_DEV_LOOP=y
@@ -560,6 +561,7 @@ CONFIG_CRYPTO_USER_API_AEAD=m
 CONFIG_PRIME_NUMBERS=m
 CONFIG_CRC32_SELFTEST=m
 CONFIG_XZ_DEC_TEST=m
+CONFIG_GLOB_SELFTEST=m
 # CONFIG_SECTION_MISMATCH_WARN_ONLY is not set
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_TEST_LOCKUP=m
diff --git a/arch/m68k/configs/hp300_defconfig b/arch/m68k/configs/hp300_defconfig
index f88356c45440..23cf07c49d14 100644
--- a/arch/m68k/configs/hp300_defconfig
+++ b/arch/m68k/configs/hp300_defconfig
@@ -294,6 +294,7 @@ CONFIG_NET_IFE=m
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_TEST_ASYNC_DRIVER_PROBE=m
+CONFIG_DM_KUNIT_TEST=m
 CONFIG_CONNECTOR=m
 CONFIG_ZRAM=m
 CONFIG_BLK_DEV_LOOP=y
@@ -570,6 +571,7 @@ CONFIG_CRYPTO_USER_API_AEAD=m
 CONFIG_PRIME_NUMBERS=m
 CONFIG_CRC32_SELFTEST=m
 CONFIG_XZ_DEC_TEST=m
+CONFIG_GLOB_SELFTEST=m
 # CONFIG_SECTION_MISMATCH_WARN_ONLY is not set
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_TEST_LOCKUP=m
diff --git a/arch/m68k/configs/mac_defconfig b/arch/m68k/configs/mac_defconfig
index 7c2ebb616fba..619a0d93ce5b 100644
--- a/arch/m68k/configs/mac_defconfig
+++ b/arch/m68k/configs/mac_defconfig
@@ -296,6 +296,7 @@ CONFIG_NET_IFE=m
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_TEST_ASYNC_DRIVER_PROBE=m
+CONFIG_DM_KUNIT_TEST=m
 CONFIG_CONNECTOR=m
 CONFIG_BLK_DEV_SWIM=m
 CONFIG_ZRAM=m
diff --git a/arch/m68k/configs/multi_defconfig b/arch/m68k/configs/multi_defconfig
index d3b272910b38..d9430bc2b2de 100644
--- a/arch/m68k/configs/multi_defconfig
+++ b/arch/m68k/configs/multi_defconfig
@@ -316,6 +316,7 @@ CONFIG_NET_IFE=m
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_TEST_ASYNC_DRIVER_PROBE=m
+CONFIG_DM_KUNIT_TEST=m
 CONFIG_CONNECTOR=m
 CONFIG_PARPORT=m
 CONFIG_PARPORT_PC=m
diff --git a/arch/m68k/configs/mvme147_defconfig b/arch/m68k/configs/mvme147_defconfig
index 4529bc4b843c..eb6132f29bf5 100644
--- a/arch/m68k/configs/mvme147_defconfig
+++ b/arch/m68k/configs/mvme147_defconfig
@@ -291,6 +291,7 @@ CONFIG_NET_IFE=m
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_TEST_ASYNC_DRIVER_PROBE=m
+CONFIG_DM_KUNIT_TEST=m
 CONFIG_CONNECTOR=m
 CONFIG_ZRAM=m
 CONFIG_BLK_DEV_LOOP=y
@@ -559,6 +560,7 @@ CONFIG_CRYPTO_USER_API_AEAD=m
 CONFIG_PRIME_NUMBERS=m
 CONFIG_CRC32_SELFTEST=m
 CONFIG_XZ_DEC_TEST=m
+CONFIG_GLOB_SELFTEST=m
 # CONFIG_SECTION_MISMATCH_WARN_ONLY is not set
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_TEST_LOCKUP=m
diff --git a/arch/m68k/configs/mvme16x_defconfig b/arch/m68k/configs/mvme16x_defconfig
index 30824032e4d5..d0bad674cbb7 100644
--- a/arch/m68k/configs/mvme16x_defconfig
+++ b/arch/m68k/configs/mvme16x_defconfig
@@ -292,6 +292,7 @@ CONFIG_NET_IFE=m
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_TEST_ASYNC_DRIVER_PROBE=m
+CONFIG_DM_KUNIT_TEST=m
 CONFIG_CONNECTOR=m
 CONFIG_ZRAM=m
 CONFIG_BLK_DEV_LOOP=y
@@ -560,6 +561,7 @@ CONFIG_CRYPTO_USER_API_AEAD=m
 CONFIG_PRIME_NUMBERS=m
 CONFIG_CRC32_SELFTEST=m
 CONFIG_XZ_DEC_TEST=m
+CONFIG_GLOB_SELFTEST=m
 # CONFIG_SECTION_MISMATCH_WARN_ONLY is not set
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_TEST_LOCKUP=m
diff --git a/arch/m68k/configs/q40_defconfig b/arch/m68k/configs/q40_defconfig
index 3911211410ed..dad6bcfcaeed 100644
--- a/arch/m68k/configs/q40_defconfig
+++ b/arch/m68k/configs/q40_defconfig
@@ -293,6 +293,7 @@ CONFIG_NET_IFE=m
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_TEST_ASYNC_DRIVER_PROBE=m
+CONFIG_DM_KUNIT_TEST=m
 CONFIG_CONNECTOR=m
 CONFIG_PARPORT=m
 CONFIG_PARPORT_PC=m
diff --git a/arch/m68k/configs/sun3_defconfig b/arch/m68k/configs/sun3_defconfig
index 991730c50957..eb1b489b3139 100644
--- a/arch/m68k/configs/sun3_defconfig
+++ b/arch/m68k/configs/sun3_defconfig
@@ -288,6 +288,7 @@ CONFIG_NET_IFE=m
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_TEST_ASYNC_DRIVER_PROBE=m
+CONFIG_DM_KUNIT_TEST=m
 CONFIG_CONNECTOR=m
 CONFIG_ZRAM=m
 CONFIG_BLK_DEV_LOOP=y
@@ -558,6 +559,7 @@ CONFIG_CRYPTO_USER_API_AEAD=m
 CONFIG_PRIME_NUMBERS=m
 CONFIG_CRC32_SELFTEST=m
 CONFIG_XZ_DEC_TEST=m
+CONFIG_GLOB_SELFTEST=m
 # CONFIG_SECTION_MISMATCH_WARN_ONLY is not set
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_TEST_LOCKUP=m
diff --git a/arch/m68k/configs/sun3x_defconfig b/arch/m68k/configs/sun3x_defconfig
index e80d7509ab1d..939589826546 100644
--- a/arch/m68k/configs/sun3x_defconfig
+++ b/arch/m68k/configs/sun3x_defconfig
@@ -289,6 +289,7 @@ CONFIG_NET_IFE=m
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_TEST_ASYNC_DRIVER_PROBE=m
+CONFIG_DM_KUNIT_TEST=m
 CONFIG_CONNECTOR=m
 CONFIG_ZRAM=m
 CONFIG_BLK_DEV_LOOP=y
@@ -558,6 +559,7 @@ CONFIG_CRYPTO_USER_API_AEAD=m
 CONFIG_PRIME_NUMBERS=m
 CONFIG_CRC32_SELFTEST=m
 CONFIG_XZ_DEC_TEST=m
+CONFIG_GLOB_SELFTEST=m
 # CONFIG_SECTION_MISMATCH_WARN_ONLY is not set
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_TEST_LOCKUP=m
diff --git a/arch/m68k/configs/virt_defconfig b/arch/m68k/configs/virt_defconfig
index 311b57e73316..ce725d39e488 100644
--- a/arch/m68k/configs/virt_defconfig
+++ b/arch/m68k/configs/virt_defconfig
@@ -45,8 +45,9 @@ CONFIG_INPUT_EVDEV=y
 CONFIG_VIRTIO_CONSOLE=y
 CONFIG_HW_RANDOM_VIRTIO=y
 CONFIG_DRM=y
+CONFIG_DRM_FBDEV_EMULATION=y
 CONFIG_DRM_VIRTIO_GPU=y
-CONFIG_FB=y
+CONFIG_FB_DEVICE=y
 CONFIG_SOUND=y
 CONFIG_SND=y
 CONFIG_SND_VIRTIO=y
diff --git a/arch/m68k/emu/natfeat.c b/arch/m68k/emu/natfeat.c
index b19dc00026d9..777c7b42a50f 100644
--- a/arch/m68k/emu/natfeat.c
+++ b/arch/m68k/emu/natfeat.c
@@ -42,10 +42,10 @@ long nf_get_id(const char *feature_name)
 {
 	/* feature_name may be in vmalloc()ed memory, so make a copy */
 	char name_copy[32];
-	size_t n;
+	ssize_t n;
 
-	n = strlcpy(name_copy, feature_name, sizeof(name_copy));
-	if (n >= sizeof(name_copy))
+	n = strscpy(name_copy, feature_name, sizeof(name_copy));
+	if (n < 0)
 		return 0;
 
 	return nf_get_id_phys(virt_to_phys(name_copy));
@@ -56,10 +56,9 @@ void nfprint(const char *fmt, ...)
 {
 	static char buf[256];
 	va_list ap;
-	int n;
 
 	va_start(ap, fmt);
-	n = vsnprintf(buf, 256, fmt, ap);
+	vsnprintf(buf, 256, fmt, ap);
 	nf_call(nf_get_id("NF_STDERR"), virt_to_phys(buf));
 	va_end(ap);
 }
diff --git a/arch/m68k/emu/nfeth.c b/arch/m68k/emu/nfeth.c
index 1a5d1e8eb4c8..26e68813f351 100644
--- a/arch/m68k/emu/nfeth.c
+++ b/arch/m68k/emu/nfeth.c
@@ -39,7 +39,7 @@ enum {
 #define MAX_UNIT	8
 
 /* These identify the driver base version and may not be removed. */
-static const char version[] =
+static const char version[] __maybe_unused =
 	KERN_INFO KBUILD_MODNAME ".c:v" DRV_VERSION " " DRV_RELDATE
 	" S.Opichal, M.Jurik, P.Stehlik\n"
 	KERN_INFO " http://aranym.org/\n";
diff --git a/arch/m68k/fpsp040/slogn.S b/arch/m68k/fpsp040/slogn.S
index d98eaf641ec4..5f3da4aa7e45 100644
--- a/arch/m68k/fpsp040/slogn.S
+++ b/arch/m68k/fpsp040/slogn.S
@@ -261,56 +261,56 @@ slognd:
 |----the value TWOTO100 is no longer needed.
 |----Note that this code assumes the denormalized input is NON-ZERO.
 
-     moveml	%d2-%d7,-(%a7)		| ...save some registers
-     movel	#0x00000000,%d3		| ...D3 is exponent of smallest norm. #
-     movel	4(%a0),%d4
-     movel	8(%a0),%d5		| ...(D4,D5) is (Hi_X,Lo_X)
-     clrl	%d2			| ...D2 used for holding K
+	moveml	%d2-%d7,-(%a7)		| ...save some registers
+	movel	#0x00000000,%d3		| ...D3 is exponent of smallest norm. #
+	movel	4(%a0),%d4
+	movel	8(%a0),%d5		| ...(D4,D5) is (Hi_X,Lo_X)
+	clrl	%d2			| ...D2 used for holding K
 
-     tstl	%d4
-     bnes	HiX_not0
+	tstl	%d4
+	bnes	HiX_not0
 
 HiX_0:
-     movel	%d5,%d4
-     clrl	%d5
-     movel	#32,%d2
-     clrl	%d6
-     bfffo      %d4{#0:#32},%d6
-     lsll      %d6,%d4
-     addl	%d6,%d2			| ...(D3,D4,D5) is normalized
-
-     movel	%d3,X(%a6)
-     movel	%d4,XFRAC(%a6)
-     movel	%d5,XFRAC+4(%a6)
-     negl	%d2
-     movel	%d2,ADJK(%a6)
-     fmovex	X(%a6),%fp0
-     moveml	(%a7)+,%d2-%d7		| ...restore registers
-     lea	X(%a6),%a0
-     bras	LOGBGN			| ...begin regular log(X)
+	movel	%d5,%d4
+	clrl	%d5
+	movel	#32,%d2
+	clrl	%d6
+	bfffo      %d4{#0:#32},%d6
+	lsll      %d6,%d4
+	addl	%d6,%d2			| ...(D3,D4,D5) is normalized
+
+	movel	%d3,X(%a6)
+	movel	%d4,XFRAC(%a6)
+	movel	%d5,XFRAC+4(%a6)
+	negl	%d2
+	movel	%d2,ADJK(%a6)
+	fmovex	X(%a6),%fp0
+	moveml	(%a7)+,%d2-%d7		| ...restore registers
+	lea	X(%a6),%a0
+	bras	LOGBGN			| ...begin regular log(X)
 
 
 HiX_not0:
-     clrl	%d6
-     bfffo	%d4{#0:#32},%d6		| ...find first 1
-     movel	%d6,%d2			| ...get k
-     lsll	%d6,%d4
-     movel	%d5,%d7			| ...a copy of D5
-     lsll	%d6,%d5
-     negl	%d6
-     addil	#32,%d6
-     lsrl	%d6,%d7
-     orl	%d7,%d4			| ...(D3,D4,D5) normalized
-
-     movel	%d3,X(%a6)
-     movel	%d4,XFRAC(%a6)
-     movel	%d5,XFRAC+4(%a6)
-     negl	%d2
-     movel	%d2,ADJK(%a6)
-     fmovex	X(%a6),%fp0
-     moveml	(%a7)+,%d2-%d7		| ...restore registers
-     lea	X(%a6),%a0
-     bras	LOGBGN			| ...begin regular log(X)
+	clrl	%d6
+	bfffo	%d4{#0:#32},%d6		| ...find first 1
+	movel	%d6,%d2			| ...get k
+	lsll	%d6,%d4
+	movel	%d5,%d7			| ...a copy of D5
+	lsll	%d6,%d5
+	negl	%d6
+	addil	#32,%d6
+	lsrl	%d6,%d7
+	orl	%d7,%d4			| ...(D3,D4,D5) normalized
+
+	movel	%d3,X(%a6)
+	movel	%d4,XFRAC(%a6)
+	movel	%d5,XFRAC+4(%a6)
+	negl	%d2
+	movel	%d2,ADJK(%a6)
+	fmovex	X(%a6),%fp0
+	moveml	(%a7)+,%d2-%d7		| ...restore registers
+	lea	X(%a6),%a0
+	bras	LOGBGN			| ...begin regular log(X)
 
 
 	.global	slogn
diff --git a/arch/m68k/hp300/time.c b/arch/m68k/hp300/time.c
index 1d1b7b3b5dd4..72621fb9f3e6 100644
--- a/arch/m68k/hp300/time.c
+++ b/arch/m68k/hp300/time.c
@@ -20,6 +20,8 @@
 #include <asm/traps.h>
 #include <asm/blinken.h>
 
+#include "time.h"
+
 static u64 hp300_read_clk(struct clocksource *cs);
 
 static struct clocksource hp300_clk = {
diff --git a/arch/m68k/ifpsp060/Makefile b/arch/m68k/ifpsp060/Makefile
index 56b530a96c2f..00d0621f547c 100644
--- a/arch/m68k/ifpsp060/Makefile
+++ b/arch/m68k/ifpsp060/Makefile
@@ -1,7 +1,5 @@
-# Makefile for 680x0 Linux 68060 integer/floating point support package
+# SPDX-License-Identifier: GPL-2.0-or-later
 #
-# This file is subject to the terms and conditions of the GNU General Public
-# License.  See the file "README.legal" in the main directory of this archive
-# for more details.
+# Makefile for 680x0 Linux 68060 integer/floating point support package
 
 obj-y := fskeleton.o iskeleton.o os.o
diff --git a/arch/m68k/include/asm/dvma.h b/arch/m68k/include/asm/dvma.h
index f609ec1de36d..d1d66d04844d 100644
--- a/arch/m68k/include/asm/dvma.h
+++ b/arch/m68k/include/asm/dvma.h
@@ -58,12 +58,16 @@ extern void dvma_free(void *vaddr);
 #define dvma_vtob(x) dvma_vtop(x)
 #define dvma_btov(x) dvma_ptov(x)
 
+void sun3_dvma_init(void);
+
 static inline int dvma_map_cpu(unsigned long kaddr, unsigned long vaddr,
 			       int len)
 {
 	return 0;
 }
 
+static inline void dvma_unmap_iommu(unsigned long baddr, int len) { }
+
 #else /* Sun3x */
 
 /* sun3x dvma page support */
@@ -78,9 +82,11 @@ static inline int dvma_map_cpu(unsigned long kaddr, unsigned long vaddr,
 #define dvma_vtob(x) ((unsigned long)(x) & 0x00ffffff)
 #define dvma_btov(x) ((unsigned long)(x) | 0xff000000)
 
-extern int dvma_map_cpu(unsigned long kaddr, unsigned long vaddr, int len);
+static inline void sun3_dvma_init(void) { }
 
+int dvma_map_cpu(unsigned long kaddr, unsigned long vaddr, int len);
 
+void dvma_unmap_iommu(unsigned long baddr, int len);
 
 /* everything below this line is specific to dma used for the onboard
    ESP scsi on sun3x */
diff --git a/arch/m68k/include/asm/io_mm.h b/arch/m68k/include/asm/io_mm.h
index 6a0abd4846c6..47525f2a57e1 100644
--- a/arch/m68k/include/asm/io_mm.h
+++ b/arch/m68k/include/asm/io_mm.h
@@ -272,20 +272,20 @@ static inline void isa_delay(void)
 #define isa_outsb(port, buf, nr) raw_outsb(isa_itb(port), (u8 *)(buf), (nr))
 
 #define isa_insw(port, buf, nr)     \
-       (ISA_SEX ? raw_insw(isa_itw(port), (u16 *)(buf), (nr)) :    \
-                  raw_insw_swapw(isa_itw(port), (u16 *)(buf), (nr)))
+	(ISA_SEX ? raw_insw(isa_itw(port), (u16 *)(buf), (nr)) :    \
+		   raw_insw_swapw(isa_itw(port), (u16 *)(buf), (nr)))
 
 #define isa_outsw(port, buf, nr)    \
-       (ISA_SEX ? raw_outsw(isa_itw(port), (u16 *)(buf), (nr)) :  \
-                  raw_outsw_swapw(isa_itw(port), (u16 *)(buf), (nr)))
+	(ISA_SEX ? raw_outsw(isa_itw(port), (u16 *)(buf), (nr)) :  \
+		   raw_outsw_swapw(isa_itw(port), (u16 *)(buf), (nr)))
 
 #define isa_insl(port, buf, nr)     \
-       (ISA_SEX ? raw_insl(isa_itl(port), (u32 *)(buf), (nr)) :    \
-                  raw_insw_swapw(isa_itw(port), (u16 *)(buf), (nr)<<1))
+	(ISA_SEX ? raw_insl(isa_itl(port), (u32 *)(buf), (nr)) :    \
+		   raw_insw_swapw(isa_itw(port), (u16 *)(buf), (nr)<<1))
 
 #define isa_outsl(port, buf, nr)    \
-       (ISA_SEX ? raw_outsl(isa_itl(port), (u32 *)(buf), (nr)) :  \
-                  raw_outsw_swapw(isa_itw(port), (u16 *)(buf), (nr)<<1))
+	(ISA_SEX ? raw_outsl(isa_itl(port), (u32 *)(buf), (nr)) :  \
+		   raw_outsw_swapw(isa_itw(port), (u16 *)(buf), (nr)<<1))
 
 
 #ifdef CONFIG_ATARI_ROM_ISA
@@ -297,14 +297,14 @@ static inline void isa_delay(void)
 #define isa_rom_insb(port, buf, nr) raw_rom_insb(isa_itb(port), (u8 *)(buf), (nr))
 
 #define isa_rom_insw(port, buf, nr)     \
-       (ISA_SEX ? raw_rom_insw(isa_itw(port), (u16 *)(buf), (nr)) :    \
-		  raw_rom_insw_swapw(isa_itw(port), (u16 *)(buf), (nr)))
+	(ISA_SEX ? raw_rom_insw(isa_itw(port), (u16 *)(buf), (nr)) :    \
+		   raw_rom_insw_swapw(isa_itw(port), (u16 *)(buf), (nr)))
 
 #define isa_rom_outsb(port, buf, nr) raw_rom_outsb(isa_itb(port), (u8 *)(buf), (nr))
 
 #define isa_rom_outsw(port, buf, nr)    \
-       (ISA_SEX ? raw_rom_outsw(isa_itw(port), (u16 *)(buf), (nr)) :  \
-		  raw_rom_outsw_swapw(isa_itw(port), (u16 *)(buf), (nr)))
+	(ISA_SEX ? raw_rom_outsw(isa_itw(port), (u16 *)(buf), (nr)) :  \
+		   raw_rom_outsw_swapw(isa_itw(port), (u16 *)(buf), (nr)))
 #endif /* CONFIG_ATARI_ROM_ISA */
 
 #endif  /* CONFIG_ISA || CONFIG_ATARI_ROM_ISA */
diff --git a/arch/m68k/include/asm/irq.h b/arch/m68k/include/asm/irq.h
index 7829e955ca04..14992fde7340 100644
--- a/arch/m68k/include/asm/irq.h
+++ b/arch/m68k/include/asm/irq.h
@@ -2,6 +2,9 @@
 #ifndef _M68K_IRQ_H_
 #define _M68K_IRQ_H_
 
+#include <linux/atomic.h>
+#include <linux/linkage.h>
+
 /*
  * This should be the same as the max(NUM_X_SOURCES) for all the
  * different m68k hosts compiled into the kernel.
@@ -59,6 +62,8 @@
 struct irq_data;
 struct irq_chip;
 struct irq_desc;
+struct pt_regs;
+
 extern unsigned int m68k_irq_startup(struct irq_data *data);
 extern unsigned int m68k_irq_startup_irq(unsigned int irq);
 extern void m68k_irq_shutdown(struct irq_data *data);
diff --git a/arch/m68k/include/asm/oplib.h b/arch/m68k/include/asm/oplib.h
index 48cb4fd09f8d..6d5ea67c65d0 100644
--- a/arch/m68k/include/asm/oplib.h
+++ b/arch/m68k/include/asm/oplib.h
@@ -9,6 +9,8 @@
 #ifndef __SPARC_OPLIB_H
 #define __SPARC_OPLIB_H
 
+#include <linux/compiler.h>
+
 #include <asm/openprom.h>
 
 /* The master romvec pointer... */
@@ -149,7 +151,7 @@ extern char prom_getchar(void);
 extern void prom_putchar(char character);
 
 /* Prom's internal printf routine, don't use in kernel/boot code. */
-void prom_printf(char *fmt, ...);
+__printf(1, 2) void prom_printf(char *fmt, ...);
 
 /* Query for input device type */
 
diff --git a/arch/m68k/include/asm/page_mm.h b/arch/m68k/include/asm/page_mm.h
index 363aa0f9ba8a..e0ae4d5fc985 100644
--- a/arch/m68k/include/asm/page_mm.h
+++ b/arch/m68k/include/asm/page_mm.h
@@ -13,17 +13,16 @@
 #ifdef CPU_M68040_OR_M68060_ONLY
 static inline void copy_page(void *to, void *from)
 {
-  unsigned long tmp;
-
-  __asm__ __volatile__("1:\t"
-		       ".chip 68040\n\t"
-		       "move16 %1@+,%0@+\n\t"
-		       "move16 %1@+,%0@+\n\t"
-		       ".chip 68k\n\t"
-		       "dbra  %2,1b\n\t"
-		       : "=a" (to), "=a" (from), "=d" (tmp)
-		       : "0" (to), "1" (from) , "2" (PAGE_SIZE / 32 - 1)
-		       );
+	unsigned long tmp;
+
+	__asm__ __volatile__("1:\t"
+			     ".chip 68040\n\t"
+			     "move16 %1@+,%0@+\n\t"
+			     "move16 %1@+,%0@+\n\t"
+			     ".chip 68k\n\t"
+			     "dbra  %2,1b\n\t"
+			     : "=a" (to), "=a" (from), "=d" (tmp)
+			     : "0" (to), "1" (from), "2" (PAGE_SIZE / 32 - 1));
 }
 
 static inline void clear_page(void *page)
@@ -95,23 +94,23 @@ static inline void *__va(unsigned long paddr)
 #define __pa(x) ___pa((unsigned long)(x))
 static inline unsigned long ___pa(unsigned long x)
 {
-     if(x == 0)
-	  return 0;
-     if(x >= PAGE_OFFSET)
-        return (x-PAGE_OFFSET);
-     else
-        return (x+0x2000000);
+	if (x == 0)
+		return 0;
+	if (x >= PAGE_OFFSET)
+		return (x - PAGE_OFFSET);
+	else
+		return (x + 0x2000000);
 }
 
 static inline void *__va(unsigned long x)
 {
-     if(x == 0)
-	  return (void *)0;
+	if (x == 0)
+		return (void *)0;
 
-     if(x < 0x2000000)
-        return (void *)(x+PAGE_OFFSET);
-     else
-        return (void *)(x-0x2000000);
+	if (x < 0x2000000)
+		return (void *)(x + PAGE_OFFSET);
+	else
+		return (void *)(x - 0x2000000);
 }
 #endif	/* CONFIG_SUN3 */
 
diff --git a/arch/m68k/include/asm/pgtable.h b/arch/m68k/include/asm/pgtable.h
index ad15d655a9bf..27525c6a12fd 100644
--- a/arch/m68k/include/asm/pgtable.h
+++ b/arch/m68k/include/asm/pgtable.h
@@ -1,6 +1,15 @@
 /* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __M68K_PGTABLE_H
+#define __M68K_PGTABLE_H
+
 #ifdef __uClinux__
 #include <asm/pgtable_no.h>
 #else
 #include <asm/pgtable_mm.h>
 #endif
+
+#ifndef __ASSEMBLY__
+extern void paging_init(void);
+#endif
+
+#endif /* __M68K_PGTABLE_H */
diff --git a/arch/m68k/include/asm/pgtable_no.h b/arch/m68k/include/asm/pgtable_no.h
index fc044df52b96..1a86c15b9008 100644
--- a/arch/m68k/include/asm/pgtable_no.h
+++ b/arch/m68k/include/asm/pgtable_no.h
@@ -28,7 +28,6 @@
 #define PAGE_READONLY	__pgprot(0)
 #define PAGE_KERNEL	__pgprot(0)
 
-extern void paging_init(void);
 #define swapper_pg_dir ((pgd_t *) 0)
 
 /*
diff --git a/arch/m68k/include/asm/raw_io.h b/arch/m68k/include/asm/raw_io.h
index 3ba40bc1dfaa..95a6ff694a68 100644
--- a/arch/m68k/include/asm/raw_io.h
+++ b/arch/m68k/include/asm/raw_io.h
@@ -17,15 +17,15 @@
  * two accesses to memory, which may be undesirable for some devices.
  */
 #define in_8(addr) \
-    ({ u8 __v = (*(__force volatile u8 *) (unsigned long)(addr)); __v; })
+    ({ u8 __v = (*(__force const volatile u8 *) (unsigned long)(addr)); __v; })
 #define in_be16(addr) \
-    ({ u16 __v = (*(__force volatile u16 *) (unsigned long)(addr)); __v; })
+    ({ u16 __v = (*(__force const volatile u16 *) (unsigned long)(addr)); __v; })
 #define in_be32(addr) \
-    ({ u32 __v = (*(__force volatile u32 *) (unsigned long)(addr)); __v; })
+    ({ u32 __v = (*(__force const volatile u32 *) (unsigned long)(addr)); __v; })
 #define in_le16(addr) \
-    ({ u16 __v = le16_to_cpu(*(__force volatile __le16 *) (unsigned long)(addr)); __v; })
+    ({ u16 __v = le16_to_cpu(*(__force const volatile __le16 *) (unsigned long)(addr)); __v; })
 #define in_le32(addr) \
-    ({ u32 __v = le32_to_cpu(*(__force volatile __le32 *) (unsigned long)(addr)); __v; })
+    ({ u32 __v = le32_to_cpu(*(__force const volatile __le32 *) (unsigned long)(addr)); __v; })
 
 #define out_8(addr,b) (void)((*(__force volatile u8 *) (unsigned long)(addr)) = (b))
 #define out_be16(addr,w) (void)((*(__force volatile u16 *) (unsigned long)(addr)) = (w))
@@ -73,11 +73,11 @@
 
 #if defined(CONFIG_ATARI_ROM_ISA)
 #define rom_in_8(addr) \
-	({ u16 __v = (*(__force volatile u16 *) (addr)); __v >>= 8; __v; })
+	({ u16 __v = (*(__force const volatile u16 *) (addr)); __v >>= 8; __v; })
 #define rom_in_be16(addr) \
-	({ u16 __v = (*(__force volatile u16 *) (addr)); __v; })
+	({ u16 __v = (*(__force const volatile u16 *) (addr)); __v; })
 #define rom_in_le16(addr) \
-	({ u16 __v = le16_to_cpu(*(__force volatile u16 *) (addr)); __v; })
+	({ u16 __v = le16_to_cpu(*(__force const volatile u16 *) (addr)); __v; })
 
 #define rom_out_8(addr, b)	\
 	(void)({u8 __maybe_unused __w, __v = (b);  u32 _addr = ((u32) (addr)); \
@@ -98,7 +98,8 @@
 #define raw_rom_outw(val, port) rom_out_be16((port), (val))
 #endif /* CONFIG_ATARI_ROM_ISA */
 
-static inline void raw_insb(volatile u8 __iomem *port, u8 *buf, unsigned int len)
+static inline void raw_insb(const volatile u8 __iomem *port, u8 *buf,
+			    unsigned int len)
 {
 	unsigned int i;
 
@@ -146,7 +147,7 @@ static inline void raw_outsb(volatile u8 __iomem *port, const u8 *buf,
 	}
 }
 
-static inline void raw_insw(volatile u16 __iomem *port, u16 *buf, unsigned int nr)
+static inline void raw_insw(volatile const u16 __iomem *port, u16 *buf, unsigned int nr)
 {
 	unsigned int tmp;
 
@@ -225,7 +226,7 @@ static inline void raw_outsw(volatile u16 __iomem *port, const u16 *buf,
 	}
 }
 
-static inline void raw_insl(volatile u32 __iomem *port, u32 *buf, unsigned int nr)
+static inline void raw_insl(const volatile u32 __iomem *port, u32 *buf, unsigned int nr)
 {
 	unsigned int tmp;
 
@@ -305,7 +306,7 @@ static inline void raw_outsl(volatile u32 __iomem *port, const u32 *buf,
 }
 
 
-static inline void raw_insw_swapw(volatile u16 __iomem *port, u16 *buf,
+static inline void raw_insw_swapw(const volatile u16 __iomem *port, u16 *buf,
 				  unsigned int nr)
 {
     if ((nr) % 8)
@@ -413,7 +414,8 @@ static inline void raw_outsw_swapw(volatile u16 __iomem *port, const u16 *buf,
 
 
 #if defined(CONFIG_ATARI_ROM_ISA)
-static inline void raw_rom_insb(volatile u8 __iomem *port, u8 *buf, unsigned int len)
+static inline void raw_rom_insb(const volatile u8 __iomem *port, u8 *buf,
+				unsigned int len)
 {
 	unsigned int i;
 
@@ -430,7 +432,7 @@ static inline void raw_rom_outsb(volatile u8 __iomem *port, const u8 *buf,
 		rom_out_8(port, *buf++);
 }
 
-static inline void raw_rom_insw(volatile u16 __iomem *port, u16 *buf,
+static inline void raw_rom_insw(const volatile u16 __iomem *port, u16 *buf,
 				   unsigned int nr)
 {
 	unsigned int i;
@@ -448,7 +450,7 @@ static inline void raw_rom_outsw(volatile u16 __iomem *port, const u16 *buf,
 		rom_out_be16(port, *buf++);
 }
 
-static inline void raw_rom_insw_swapw(volatile u16 __iomem *port, u16 *buf,
+static inline void raw_rom_insw_swapw(const volatile u16 __iomem *port, u16 *buf,
 				   unsigned int nr)
 {
 	unsigned int i;
diff --git a/arch/m68k/include/asm/sun3_pgalloc.h b/arch/m68k/include/asm/sun3_pgalloc.h
index ff48573db2c0..4a137eecb6fe 100644
--- a/arch/m68k/include/asm/sun3_pgalloc.h
+++ b/arch/m68k/include/asm/sun3_pgalloc.h
@@ -41,12 +41,12 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page
 
 static inline pgd_t * pgd_alloc(struct mm_struct *mm)
 {
-     pgd_t *new_pgd;
+	pgd_t *new_pgd;
 
-     new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
-     memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
-     memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT));
-     return new_pgd;
+	new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
+	memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
+	memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT));
+	return new_pgd;
 }
 
 #endif /* SUN3_PGALLOC_H */
diff --git a/arch/m68k/include/asm/syscalls.h b/arch/m68k/include/asm/syscalls.h
new file mode 100644
index 000000000000..fb3639acd07b
--- /dev/null
+++ b/arch/m68k/include/asm/syscalls.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef _ASM_M68K_SYSCALLS_H
+#define _ASM_M68K_SYSCALLS_H
+
+#include <linux/compiler_types.h>
+#include <linux/linkage.h>
+
+asmlinkage int sys_cacheflush(unsigned long addr, int scope, int cache,
+			      unsigned long len);
+asmlinkage int sys_atomic_cmpxchg_32(unsigned long newval, int oldval, int d3,
+				     int d4, int d5, unsigned long __user *mem);
+asmlinkage int sys_getpagesize(void);
+asmlinkage unsigned long sys_get_thread_area(void);
+asmlinkage int sys_set_thread_area(unsigned long tp);
+asmlinkage int sys_atomic_barrier(void);
+
+#include <asm-generic/syscalls.h>
+
+#endif	/* _ASM_M68K_SYSCALLS_H */
diff --git a/arch/m68k/include/asm/tlbflush.h b/arch/m68k/include/asm/tlbflush.h
index b882e2f4f551..6d42e2906887 100644
--- a/arch/m68k/include/asm/tlbflush.h
+++ b/arch/m68k/include/asm/tlbflush.h
@@ -112,53 +112,51 @@ extern unsigned char pmeg_ctx[SUN3_PMEGS_NUM];
    sun?) */
 static inline void flush_tlb_all(void)
 {
-       unsigned long addr;
-       unsigned char ctx, oldctx;
-
-       oldctx = sun3_get_context();
-       for(addr = 0x00000000; addr < TASK_SIZE; addr += SUN3_PMEG_SIZE) {
-	       for(ctx = 0; ctx < 8; ctx++) {
-		       sun3_put_context(ctx);
-		       sun3_put_segmap(addr, SUN3_INVALID_PMEG);
-	       }
-       }
-
-       sun3_put_context(oldctx);
-       /* erase all of the userspace pmeg maps, we've clobbered them
-	  all anyway */
-       for(addr = 0; addr < SUN3_INVALID_PMEG; addr++) {
-	       if(pmeg_alloc[addr] == 1) {
-		       pmeg_alloc[addr] = 0;
-		       pmeg_ctx[addr] = 0;
-		       pmeg_vaddr[addr] = 0;
-	       }
-       }
+	unsigned long addr;
+	unsigned char ctx, oldctx;
 
+	oldctx = sun3_get_context();
+	for (addr = 0x00000000; addr < TASK_SIZE; addr += SUN3_PMEG_SIZE) {
+		for (ctx = 0; ctx < 8; ctx++) {
+			sun3_put_context(ctx);
+			sun3_put_segmap(addr, SUN3_INVALID_PMEG);
+		}
+	}
+
+	sun3_put_context(oldctx);
+	/* erase all of the userspace pmeg maps, we've clobbered them
+	   all anyway */
+	for (addr = 0; addr < SUN3_INVALID_PMEG; addr++) {
+		if (pmeg_alloc[addr] == 1) {
+			pmeg_alloc[addr] = 0;
+			pmeg_ctx[addr] = 0;
+			pmeg_vaddr[addr] = 0;
+		}
+	}
 }
 
 /* Clear user TLB entries within the context named in mm */
 static inline void flush_tlb_mm (struct mm_struct *mm)
 {
-     unsigned char oldctx;
-     unsigned char seg;
-     unsigned long i;
-
-     oldctx = sun3_get_context();
-     sun3_put_context(mm->context);
+	unsigned char oldctx;
+	unsigned char seg;
+	unsigned long i;
 
-     for(i = 0; i < TASK_SIZE; i += SUN3_PMEG_SIZE) {
-	     seg = sun3_get_segmap(i);
-	     if(seg == SUN3_INVALID_PMEG)
-		     continue;
+	oldctx = sun3_get_context();
+	sun3_put_context(mm->context);
 
-	     sun3_put_segmap(i, SUN3_INVALID_PMEG);
-	     pmeg_alloc[seg] = 0;
-	     pmeg_ctx[seg] = 0;
-	     pmeg_vaddr[seg] = 0;
-     }
+	for (i = 0; i < TASK_SIZE; i += SUN3_PMEG_SIZE) {
+		seg = sun3_get_segmap(i);
+		if (seg == SUN3_INVALID_PMEG)
+			continue;
 
-     sun3_put_context(oldctx);
+		sun3_put_segmap(i, SUN3_INVALID_PMEG);
+		pmeg_alloc[seg] = 0;
+		pmeg_ctx[seg] = 0;
+		pmeg_vaddr[seg] = 0;
+	}
 
+	sun3_put_context(oldctx);
 }
 
 /* Flush a single TLB page. In this case, we're limited to flushing a
@@ -208,6 +206,7 @@ static inline void flush_tlb_range (struct vm_area_struct *vma,
 	next:
 		start += SUN3_PMEG_SIZE;
 	}
+	sun3_put_context(oldctx);
 }
 
 static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end)
diff --git a/arch/m68k/kernel/early_printk.c b/arch/m68k/kernel/early_printk.c
index 7d3fe08a48eb..3cc944df04f6 100644
--- a/arch/m68k/kernel/early_printk.c
+++ b/arch/m68k/kernel/early_printk.c
@@ -12,8 +12,8 @@
 #include <linux/string.h>
 #include <asm/setup.h>
 
-extern void mvme16x_cons_write(struct console *co,
-			       const char *str, unsigned count);
+
+#include "../mvme16x/mvme16x.h"
 
 asmlinkage void __init debug_cons_nputs(const char *s, unsigned n);
 
diff --git a/arch/m68k/kernel/entry.S b/arch/m68k/kernel/entry.S
index 4dd2fd7acba9..3bcdd32a6b36 100644
--- a/arch/m68k/kernel/entry.S
+++ b/arch/m68k/kernel/entry.S
@@ -1,13 +1,10 @@
-/* -*- mode: asm -*-
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * -*- mode: asm -*-
  *
  *  linux/arch/m68k/kernel/entry.S
  *
  *  Copyright (C) 1991, 1992  Linus Torvalds
  *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file README.legal in the main directory of this archive
- * for more details.
- *
  * Linux/m68k support by Hamish Macdonald
  *
  * 68060 fixes by Jesper Skov
diff --git a/arch/m68k/kernel/head.S b/arch/m68k/kernel/head.S
index 9e812d8606be..852255cf60de 100644
--- a/arch/m68k/kernel/head.S
+++ b/arch/m68k/kernel/head.S
@@ -1,4 +1,5 @@
-/* -*- mode: asm -*-
+/* SPDX-License-Identifier: GPL-2.0-or-later
+** -*- mode: asm -*-
 **
 ** head.S -- This file contains the initial boot code for the
 **	     Linux/68k kernel.
@@ -25,11 +26,6 @@
 **            for linux-2.1.115
 ** 1999/02/11  Richard Zidlicky: added Q40 support (initial version 99/01/01)
 ** 2004/05/13 Kars de Jong: Finalised HP300 support
-**
-** This file is subject to the terms and conditions of the GNU General Public
-** License. See the file README.legal in the main directory of this archive
-** for more details.
-**
 */
 
 /*
diff --git a/arch/m68k/kernel/ints.c b/arch/m68k/kernel/ints.c
index 5b8d66fbf383..cf2b13488476 100644
--- a/arch/m68k/kernel/ints.c
+++ b/arch/m68k/kernel/ints.c
@@ -26,6 +26,8 @@
 #include <asm/q40ints.h>
 #endif
 
+#include "ints.h"
+
 extern u32 auto_irqhandler_fixup[];
 extern u16 user_irqvec_fixup[];
 
diff --git a/arch/m68k/kernel/ints.h b/arch/m68k/kernel/ints.h
new file mode 100644
index 000000000000..ecac6011c1a4
--- /dev/null
+++ b/arch/m68k/kernel/ints.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <linux/linkage.h>
+
+struct pt_regs;
+
+asmlinkage void handle_badint(struct pt_regs *regs);
diff --git a/arch/m68k/kernel/process.c b/arch/m68k/kernel/process.c
index e06ce147c0b7..2584e94e2134 100644
--- a/arch/m68k/kernel/process.c
+++ b/arch/m68k/kernel/process.c
@@ -38,6 +38,7 @@
 #include <asm/machdep.h>
 #include <asm/setup.h>
 
+#include "process.h"
 
 asmlinkage void ret_from_fork(void);
 asmlinkage void ret_from_kernel_thread(void);
diff --git a/arch/m68k/kernel/process.h b/arch/m68k/kernel/process.h
new file mode 100644
index 000000000000..d31745f2e64b
--- /dev/null
+++ b/arch/m68k/kernel/process.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#include <linux/linkage.h>
+
+struct pt_regs;
+
+asmlinkage int m68k_clone(struct pt_regs *regs);
+asmlinkage int m68k_clone3(struct pt_regs *regs);
diff --git a/arch/m68k/kernel/ptrace.c b/arch/m68k/kernel/ptrace.c
index cd0172d29430..c20d590e4297 100644
--- a/arch/m68k/kernel/ptrace.c
+++ b/arch/m68k/kernel/ptrace.c
@@ -26,6 +26,8 @@
 #include <asm/page.h>
 #include <asm/processor.h>
 
+#include "ptrace.h"
+
 /*
  * does not yet catch signals sent when the child dies.
  * in exit.c or in signal.c.
diff --git a/arch/m68k/kernel/ptrace.h b/arch/m68k/kernel/ptrace.h
new file mode 100644
index 000000000000..77018037f10f
--- /dev/null
+++ b/arch/m68k/kernel/ptrace.h
@@ -0,0 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <linux/linkage.h>
+
+asmlinkage int syscall_trace_enter(void);
+asmlinkage void syscall_trace_leave(void);
diff --git a/arch/m68k/kernel/setup_mm.c b/arch/m68k/kernel/setup_mm.c
index 6f1ae01f322c..10310b04f77d 100644
--- a/arch/m68k/kernel/setup_mm.c
+++ b/arch/m68k/kernel/setup_mm.c
@@ -107,8 +107,6 @@ EXPORT_SYMBOL(isa_sex);
 
 #define MASK_256K 0xfffc0000
 
-extern void paging_init(void);
-
 static void __init m68k_parse_bootinfo(const struct bi_record *record)
 {
 	const struct bi_record *first_record = record;
diff --git a/arch/m68k/kernel/signal.c b/arch/m68k/kernel/signal.c
index ba468b5f3f0b..e628b859ef21 100644
--- a/arch/m68k/kernel/signal.c
+++ b/arch/m68k/kernel/signal.c
@@ -51,6 +51,8 @@
 #include <asm/ucontext.h>
 #include <asm/cacheflush.h>
 
+#include "signal.h"
+
 #ifdef CONFIG_MMU
 
 /*
@@ -1109,7 +1111,7 @@ static void do_signal(struct pt_regs *regs)
 	restore_saved_sigmask();
 }
 
-void do_notify_resume(struct pt_regs *regs)
+asmlinkage void do_notify_resume(struct pt_regs *regs)
 {
 	if (test_thread_flag(TIF_NOTIFY_SIGNAL) ||
 	    test_thread_flag(TIF_SIGPENDING))
diff --git a/arch/m68k/kernel/signal.h b/arch/m68k/kernel/signal.h
new file mode 100644
index 000000000000..498d84f82820
--- /dev/null
+++ b/arch/m68k/kernel/signal.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <linux/linkage.h>
+
+asmlinkage void do_notify_resume(struct pt_regs *regs);
+asmlinkage void *do_sigreturn(struct pt_regs *regs, struct switch_stack *sw);
+asmlinkage void *do_rt_sigreturn(struct pt_regs *regs, struct switch_stack *sw);
diff --git a/arch/m68k/kernel/sys_m68k.c b/arch/m68k/kernel/sys_m68k.c
index c586034d2a7a..1af5e6082467 100644
--- a/arch/m68k/kernel/sys_m68k.c
+++ b/arch/m68k/kernel/sys_m68k.c
@@ -27,6 +27,7 @@
 #include <asm/cachectl.h>
 #include <asm/traps.h>
 #include <asm/page.h>
+#include <asm/syscalls.h>
 #include <asm/unistd.h>
 #include <asm/cacheflush.h>
 
@@ -34,8 +35,7 @@
 
 #include <asm/tlb.h>
 
-asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address,
-			     unsigned long error_code);
+#include "../mm/fault.h"
 
 asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
 	unsigned long prot, unsigned long flags,
diff --git a/arch/m68k/kernel/traps.c b/arch/m68k/kernel/traps.c
index a700807c9b6d..53d0cf343d90 100644
--- a/arch/m68k/kernel/traps.c
+++ b/arch/m68k/kernel/traps.c
@@ -41,6 +41,9 @@
 #include <asm/siginfo.h>
 #include <asm/tlbflush.h>
 
+#include "traps.h"
+#include "../mm/fault.h"
+
 static const char *vec_names[] = {
 	[VEC_RESETSP]	= "RESET SP",
 	[VEC_RESETPC]	= "RESET PC",
@@ -124,10 +127,6 @@ static const char *space_names[] = {
 };
 
 void die_if_kernel(char *,struct pt_regs *,int);
-asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address,
-                             unsigned long error_code);
-int send_fault_sig(struct pt_regs *regs);
-
 asmlinkage void trap_c(struct frame *fp);
 
 #if defined (CONFIG_M68060)
@@ -365,7 +364,7 @@ disable_wb:
 #if defined(CONFIG_SUN3)
 #include <asm/sun3mmu.h>
 
-extern int mmu_emu_handle_fault (unsigned long, int, int);
+#include "../sun3/sun3.h"
 
 /* sun3 version of bus_error030 */
 
@@ -487,10 +486,10 @@ static inline void bus_error030 (struct frame *fp)
 	if (buserr_type & SUN3_BUSERR_INVALID) {
 		if (!mmu_emu_handle_fault(addr, 1, 0))
 			do_page_fault (&fp->ptregs, addr, 0);
-       } else {
+	} else {
 		pr_debug("protection fault on insn access (segv).\n");
 		force_sig (SIGSEGV);
-       }
+	}
 }
 #else
 #if defined(CPU_M68020_OR_M68030)
@@ -851,9 +850,9 @@ void show_registers(struct pt_regs *regs)
 	pr_info("PC: [<%08lx>] %pS\n", regs->pc, (void *)regs->pc);
 	pr_info("SR: %04x  SP: %p  a2: %08lx\n", regs->sr, regs, regs->a2);
 	pr_info("d0: %08lx    d1: %08lx    d2: %08lx    d3: %08lx\n",
-	       regs->d0, regs->d1, regs->d2, regs->d3);
+		regs->d0, regs->d1, regs->d2, regs->d3);
 	pr_info("d4: %08lx    d5: %08lx    a0: %08lx    a1: %08lx\n",
-	       regs->d4, regs->d5, regs->a0, regs->a1);
+		regs->d4, regs->d5, regs->a0, regs->a1);
 
 	pr_info("Process %s (pid: %d, task=%p)\n",
 		current->comm, task_pid_nr(current), current);
@@ -965,7 +964,7 @@ void show_stack(struct task_struct *task, unsigned long *stack,
  * real 68k parts, but it won't hurt either.
  */
 
-void bad_super_trap (struct frame *fp)
+static void bad_super_trap(struct frame *fp)
 {
 	int vector = (fp->ptregs.vector >> 2) & 0xff;
 
diff --git a/arch/m68k/kernel/traps.h b/arch/m68k/kernel/traps.h
new file mode 100644
index 000000000000..6414b4a0e558
--- /dev/null
+++ b/arch/m68k/kernel/traps.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <linux/linkage.h>
+
+struct frame;
+
+asmlinkage void buserr_c(struct frame *fp);
+asmlinkage void fpemu_signal(int signal, int code, void *addr);
+asmlinkage void fpsp040_die(void);
+asmlinkage void set_esp0(unsigned long ssp);
diff --git a/arch/m68k/kernel/vectors.c b/arch/m68k/kernel/vectors.c
index 322c977bb9ec..667e848070f4 100644
--- a/arch/m68k/kernel/vectors.c
+++ b/arch/m68k/kernel/vectors.c
@@ -17,6 +17,7 @@
 /*
  * Sets up all exception vectors
  */
+#include <linux/cpu.h>
 #include <linux/sched.h>
 #include <linux/kernel.h>
 #include <linux/linkage.h>
@@ -27,6 +28,8 @@
 #include <asm/fpu.h>
 #include <asm/traps.h>
 
+#include "vectors.h"
+
 /* assembler routines */
 asmlinkage void system_call(void);
 asmlinkage void buserr(void);
diff --git a/arch/m68k/kernel/vectors.h b/arch/m68k/kernel/vectors.h
new file mode 100644
index 000000000000..897330737ec5
--- /dev/null
+++ b/arch/m68k/kernel/vectors.h
@@ -0,0 +1,3 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+void base_trap_init(void);
diff --git a/arch/m68k/lib/Makefile b/arch/m68k/lib/Makefile
index eca17f14b4d5..9158688e6cc6 100644
--- a/arch/m68k/lib/Makefile
+++ b/arch/m68k/lib/Makefile
@@ -4,8 +4,7 @@
 # Makefile for m68k-specific library files..
 #
 
-lib-y	:= ashldi3.o ashrdi3.o lshrdi3.o muldi3.o \
-	   memcpy.o memset.o memmove.o
+lib-y	:= muldi3.o memcpy.o memset.o memmove.o
 
 lib-$(CONFIG_MMU) += uaccess.o
 lib-$(CONFIG_CPU_HAS_NO_MULDIV64) += mulsi3.o divsi3.o udivsi3.o
diff --git a/arch/m68k/lib/ashldi3.c b/arch/m68k/lib/ashldi3.c
deleted file mode 100644
index ac08f8141390..000000000000
--- a/arch/m68k/lib/ashldi3.c
+++ /dev/null
@@ -1,61 +0,0 @@
-/* ashrdi3.c extracted from gcc-2.95.2/libgcc2.c which is: */
-/* Copyright (C) 1989, 92-98, 1999 Free Software Foundation, Inc.
-
-This file is part of GNU CC.
-
-GNU CC is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU CC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details. */
-
-#include <linux/compiler.h>
-#include <linux/export.h>
-
-#define BITS_PER_UNIT 8
-
-typedef		 int SItype	__mode(SI);
-typedef unsigned int USItype	__mode(SI);
-typedef		 int DItype	__mode(DI);
-typedef int word_type           __mode(__word__);
-
-struct DIstruct {SItype high, low;};
-
-typedef union
-{
-  struct DIstruct s;
-  DItype ll;
-} DIunion;
-
-DItype
-__ashldi3 (DItype u, word_type b)
-{
-  DIunion w;
-  word_type bm;
-  DIunion uu;
-
-  if (b == 0)
-    return u;
-
-  uu.ll = u;
-
-  bm = (sizeof (SItype) * BITS_PER_UNIT) - b;
-  if (bm <= 0)
-    {
-      w.s.low = 0;
-      w.s.high = (USItype)uu.s.low << -bm;
-    }
-  else
-    {
-      USItype carries = (USItype)uu.s.low >> bm;
-      w.s.low = (USItype)uu.s.low << b;
-      w.s.high = ((USItype)uu.s.high << b) | carries;
-    }
-
-  return w.ll;
-}
-EXPORT_SYMBOL(__ashldi3);
diff --git a/arch/m68k/lib/ashrdi3.c b/arch/m68k/lib/ashrdi3.c
deleted file mode 100644
index 5837b1dd3334..000000000000
--- a/arch/m68k/lib/ashrdi3.c
+++ /dev/null
@@ -1,62 +0,0 @@
-/* ashrdi3.c extracted from gcc-2.7.2/libgcc2.c which is: */
-/* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
-
-This file is part of GNU CC.
-
-GNU CC is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU CC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details. */
-
-#include <linux/compiler.h>
-#include <linux/export.h>
-
-#define BITS_PER_UNIT 8
-
-typedef		 int SItype	__mode(SI);
-typedef unsigned int USItype	__mode(SI);
-typedef		 int DItype	__mode(DI);
-typedef int word_type           __mode(__word__);
-
-struct DIstruct {SItype high, low;};
-
-typedef union
-{
-  struct DIstruct s;
-  DItype ll;
-} DIunion;
-
-DItype
-__ashrdi3 (DItype u, word_type b)
-{
-  DIunion w;
-  word_type bm;
-  DIunion uu;
-
-  if (b == 0)
-    return u;
-
-  uu.ll = u;
-
-  bm = (sizeof (SItype) * BITS_PER_UNIT) - b;
-  if (bm <= 0)
-    {
-      /* w.s.high = 1..1 or 0..0 */
-      w.s.high = uu.s.high >> (sizeof (SItype) * BITS_PER_UNIT - 1);
-      w.s.low = uu.s.high >> -bm;
-    }
-  else
-    {
-      USItype carries = (USItype)uu.s.high << bm;
-      w.s.high = uu.s.high >> b;
-      w.s.low = ((USItype)uu.s.low >> b) | carries;
-    }
-
-  return w.ll;
-}
-EXPORT_SYMBOL(__ashrdi3);
diff --git a/arch/m68k/lib/lshrdi3.c b/arch/m68k/lib/lshrdi3.c
deleted file mode 100644
index 7f40566be6c8..000000000000
--- a/arch/m68k/lib/lshrdi3.c
+++ /dev/null
@@ -1,61 +0,0 @@
-/* lshrdi3.c extracted from gcc-2.7.2/libgcc2.c which is: */
-/* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
-
-This file is part of GNU CC.
-
-GNU CC is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU CC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details. */
-
-#include <linux/compiler.h>
-#include <linux/export.h>
-
-#define BITS_PER_UNIT 8
-
-typedef		 int SItype	__mode(SI);
-typedef unsigned int USItype	__mode(SI);
-typedef		 int DItype	__mode(DI);
-typedef int word_type           __mode(__word__);
-
-struct DIstruct {SItype high, low;};
-
-typedef union
-{
-  struct DIstruct s;
-  DItype ll;
-} DIunion;
-
-DItype
-__lshrdi3 (DItype u, word_type b)
-{
-  DIunion w;
-  word_type bm;
-  DIunion uu;
-
-  if (b == 0)
-    return u;
-
-  uu.ll = u;
-
-  bm = (sizeof (SItype) * BITS_PER_UNIT) - b;
-  if (bm <= 0)
-    {
-      w.s.high = 0;
-      w.s.low = (USItype)uu.s.high >> -bm;
-    }
-  else
-    {
-      USItype carries = (USItype)uu.s.high << bm;
-      w.s.high = (USItype)uu.s.high >> b;
-      w.s.low = ((USItype)uu.s.low >> b) | carries;
-    }
-
-  return w.ll;
-}
-EXPORT_SYMBOL(__lshrdi3);
diff --git a/arch/m68k/lib/muldi3.c b/arch/m68k/lib/muldi3.c
index eb7d9d86ff66..5012a9b218c7 100644
--- a/arch/m68k/lib/muldi3.c
+++ b/arch/m68k/lib/muldi3.c
@@ -16,6 +16,7 @@ GNU General Public License for more details. */
 
 #include <linux/compiler.h>
 #include <linux/export.h>
+#include <linux/libgcc.h>
 
 #ifdef CONFIG_CPU_HAS_NO_MULDIV64
 
diff --git a/arch/m68k/mac/baboon.c b/arch/m68k/mac/baboon.c
index a7d280220662..5c97a7058bcd 100644
--- a/arch/m68k/mac/baboon.c
+++ b/arch/m68k/mac/baboon.c
@@ -15,6 +15,8 @@
 #include <asm/macints.h>
 #include <asm/mac_baboon.h>
 
+#include "mac.h"
+
 int baboon_present;
 static volatile struct baboon *baboon;
 
diff --git a/arch/m68k/mac/config.c b/arch/m68k/mac/config.c
index 382f656c29ea..e324410ef239 100644
--- a/arch/m68k/mac/config.c
+++ b/arch/m68k/mac/config.c
@@ -50,22 +50,14 @@
 #include <asm/mac_psc.h>
 #include <asm/config.h>
 
+#include "mac.h"
+
 /* Mac bootinfo struct */
 struct mac_booter_data mac_bi_data;
 
 /* The phys. video addr. - might be bogus on some machines */
 static unsigned long mac_orig_videoaddr;
 
-extern int mac_hwclk(int, struct rtc_time *);
-extern void iop_init(void);
-extern void via_init(void);
-extern void via_init_clock(void);
-extern void oss_init(void);
-extern void psc_init(void);
-extern void baboon_init(void);
-
-extern void mac_mksound(unsigned int, unsigned int);
-
 static void mac_get_model(char *str);
 static void mac_identify(void);
 static void mac_report_hardware(void);
@@ -958,7 +950,7 @@ static const struct pata_platform_info mac_pata_data __initconst = {
 	.ioport_shift = 2,
 };
 
-int __init mac_platform_init(void)
+static int __init mac_platform_init(void)
 {
 	phys_addr_t swim_base = 0;
 
diff --git a/arch/m68k/mac/iop.c b/arch/m68k/mac/iop.c
index 010b3b5ae8e8..a92740d530ac 100644
--- a/arch/m68k/mac/iop.c
+++ b/arch/m68k/mac/iop.c
@@ -119,6 +119,8 @@
 #include <asm/macints.h>
 #include <asm/mac_iop.h>
 
+#include "mac.h"
+
 #ifdef DEBUG
 #define iop_pr_debug(fmt, ...) \
 	printk(KERN_DEBUG "%s: " fmt, __func__, ##__VA_ARGS__)
diff --git a/arch/m68k/mac/mac.h b/arch/m68k/mac/mac.h
new file mode 100644
index 000000000000..d3d142cea3b4
--- /dev/null
+++ b/arch/m68k/mac/mac.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+struct rtc_time;
+
+/* baboon.c */
+void baboon_init(void);
+
+/* iop.c */
+void iop_init(void);
+
+/* misc.c */
+int mac_hwclk(int op, struct rtc_time *t);
+
+/* macboing.c */
+void mac_mksound(unsigned int freq, unsigned int length);
+
+/* oss.c */
+void oss_init(void);
+
+/* psc.c */
+void psc_init(void);
+
+/* via.c */
+void via_init(void);
+void via_init_clock(void);
diff --git a/arch/m68k/mac/macboing.c b/arch/m68k/mac/macboing.c
index 4de6229c7bfd..faea2265a540 100644
--- a/arch/m68k/mac/macboing.c
+++ b/arch/m68k/mac/macboing.c
@@ -16,6 +16,8 @@
 #include <asm/macintosh.h>
 #include <asm/mac_asc.h>
 
+#include "mac.h"
+
 static int mac_asc_inited;
 /*
  * dumb triangular wave table
@@ -23,15 +25,6 @@ static int mac_asc_inited;
 static __u8 mac_asc_wave_tab[ 0x800 ];
 
 /*
- * Alan's original sine table; needs interpolating to 0x800
- * (hint: interpolate or hardwire [0 -> Pi/2[, it's symmetric)
- */
-static const signed char sine_data[] = {
-	0,  39,  75,  103,  121,  127,  121,  103,  75,  39,
-	0, -39, -75, -103, -121, -127, -121, -103, -75, -39
-};
-
-/*
  * where the ASC hides ...
  */
 static volatile __u8* mac_asc_regs = ( void* )0x50F14000;
diff --git a/arch/m68k/mac/misc.c b/arch/m68k/mac/misc.c
index c7cb29f0ff01..4c8f8cbfa05f 100644
--- a/arch/m68k/mac/misc.c
+++ b/arch/m68k/mac/misc.c
@@ -25,6 +25,8 @@
 
 #include <asm/machdep.h>
 
+#include "mac.h"
+
 /*
  * Offset between Unix time (1970-based) and Mac time (1904-based). Cuda and PMU
  * times wrap in 2040. If we need to handle later times, the read_time functions
@@ -554,7 +556,7 @@ static void unmktime(time64_t time, long offset,
 		/* Leap years.  */
 		{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
 	};
-	int days, rem, y, wday, yday;
+	int days, rem, y, wday;
 	const unsigned short int *ip;
 
 	days = div_u64_rem(time, SECS_PER_DAY, &rem);
@@ -592,7 +594,6 @@ static void unmktime(time64_t time, long offset,
 		y = yg;
 	}
 	*yearp = y - 1900;
-	yday = days; /* day in the year.  Not currently used. */
 	ip = __mon_yday[__isleap(y)];
 	for (y = 11; days < (long int) ip[y]; --y)
 		continue;
diff --git a/arch/m68k/mac/oss.c b/arch/m68k/mac/oss.c
index 921e6c092f2c..1641607f300d 100644
--- a/arch/m68k/mac/oss.c
+++ b/arch/m68k/mac/oss.c
@@ -27,6 +27,8 @@
 #include <asm/mac_via.h>
 #include <asm/mac_oss.h>
 
+#include "mac.h"
+
 int oss_present;
 volatile struct mac_oss *oss;
 
diff --git a/arch/m68k/mac/psc.c b/arch/m68k/mac/psc.c
index 0d0965b19c09..b4183cf66efe 100644
--- a/arch/m68k/mac/psc.c
+++ b/arch/m68k/mac/psc.c
@@ -26,6 +26,8 @@
 #include <asm/macints.h>
 #include <asm/mac_psc.h>
 
+#include "mac.h"
+
 #define DEBUG_PSC
 
 volatile __u8 *psc;
diff --git a/arch/m68k/mac/via.c b/arch/m68k/mac/via.c
index 3d11d6219cdd..01e6b0e37f8d 100644
--- a/arch/m68k/mac/via.c
+++ b/arch/m68k/mac/via.c
@@ -38,6 +38,8 @@
 #include <asm/mac_psc.h>
 #include <asm/mac_oss.h>
 
+#include "mac.h"
+
 volatile __u8 *via1, *via2;
 int rbv_present;
 int via_alt_mapping;
diff --git a/arch/m68k/math-emu/fp_arith.c b/arch/m68k/math-emu/fp_arith.c
index f4a06492cd7a..799c450fe322 100644
--- a/arch/m68k/math-emu/fp_arith.c
+++ b/arch/m68k/math-emu/fp_arith.c
@@ -28,8 +28,7 @@ const struct fp_ext fp_Inf =
 
 /* let's start with the easy ones */
 
-struct fp_ext *
-fp_fabs(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fabs(struct fp_ext *dest, struct fp_ext *src)
 {
 	dprint(PINSTR, "fabs\n");
 
@@ -40,8 +39,7 @@ fp_fabs(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_fneg(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fneg(struct fp_ext *dest, struct fp_ext *src)
 {
 	dprint(PINSTR, "fneg\n");
 
@@ -57,8 +55,7 @@ fp_fneg(struct fp_ext *dest, struct fp_ext *src)
 /* fp_fadd: Implements the kernel of the FADD, FSADD, FDADD, FSUB,
    FDSUB, and FCMP instructions. */
 
-struct fp_ext *
-fp_fadd(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fadd(struct fp_ext *dest, struct fp_ext *src)
 {
 	int diff;
 
@@ -117,8 +114,7 @@ fp_fadd(struct fp_ext *dest, struct fp_ext *src)
 
    Remember that the arguments are in assembler-syntax order! */
 
-struct fp_ext *
-fp_fsub(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fsub(struct fp_ext *dest, struct fp_ext *src)
 {
 	dprint(PINSTR, "fsub ");
 
@@ -127,8 +123,7 @@ fp_fsub(struct fp_ext *dest, struct fp_ext *src)
 }
 
 
-struct fp_ext *
-fp_fcmp(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fcmp(struct fp_ext *dest, struct fp_ext *src)
 {
 	dprint(PINSTR, "fcmp ");
 
@@ -137,8 +132,7 @@ fp_fcmp(struct fp_ext *dest, struct fp_ext *src)
 	return fp_fadd(&FPDATA->temp[1], src);
 }
 
-struct fp_ext *
-fp_ftst(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_ftst(struct fp_ext *dest, struct fp_ext *src)
 {
 	dprint(PINSTR, "ftst\n");
 
@@ -147,8 +141,7 @@ fp_ftst(struct fp_ext *dest, struct fp_ext *src)
 	return src;
 }
 
-struct fp_ext *
-fp_fmul(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fmul(struct fp_ext *dest, struct fp_ext *src)
 {
 	union fp_mant128 temp;
 	int exp;
@@ -225,8 +218,7 @@ fp_fmul(struct fp_ext *dest, struct fp_ext *src)
    Note that the order of the operands is counter-intuitive: instead
    of src / dest, the result is actually dest / src. */
 
-struct fp_ext *
-fp_fdiv(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fdiv(struct fp_ext *dest, struct fp_ext *src)
 {
 	union fp_mant128 temp;
 	int exp;
@@ -306,8 +298,7 @@ fp_fdiv(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_fsglmul(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fsglmul(struct fp_ext *dest, struct fp_ext *src)
 {
 	int exp;
 
@@ -363,8 +354,7 @@ fp_fsglmul(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_fsgldiv(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fsgldiv(struct fp_ext *dest, struct fp_ext *src)
 {
 	int exp;
 	unsigned long quot, rem;
@@ -573,8 +563,8 @@ static void fp_roundint(struct fp_ext *dest, int mode)
    (which are exactly the same, except for the rounding used on the
    intermediate value) */
 
-static struct fp_ext *
-modrem_kernel(struct fp_ext *dest, struct fp_ext *src, int mode)
+static struct fp_ext *modrem_kernel(struct fp_ext *dest, struct fp_ext *src,
+				    int mode)
 {
 	struct fp_ext tmp;
 
@@ -607,8 +597,7 @@ modrem_kernel(struct fp_ext *dest, struct fp_ext *src, int mode)
 
    fmod(src,dest) = (dest - (src * floor(dest / src))) */
 
-struct fp_ext *
-fp_fmod(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fmod(struct fp_ext *dest, struct fp_ext *src)
 {
 	dprint(PINSTR, "fmod\n");
 	return modrem_kernel(dest, src, FPCR_ROUND_RZ);
@@ -619,15 +608,13 @@ fp_fmod(struct fp_ext *dest, struct fp_ext *src)
    frem(src,dest) = (dest - (src * round(dest / src)))
  */
 
-struct fp_ext *
-fp_frem(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_frem(struct fp_ext *dest, struct fp_ext *src)
 {
 	dprint(PINSTR, "frem\n");
 	return modrem_kernel(dest, src, FPCR_ROUND_RN);
 }
 
-struct fp_ext *
-fp_fint(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fint(struct fp_ext *dest, struct fp_ext *src)
 {
 	dprint(PINSTR, "fint\n");
 
@@ -638,8 +625,7 @@ fp_fint(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_fintrz(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fintrz(struct fp_ext *dest, struct fp_ext *src)
 {
 	dprint(PINSTR, "fintrz\n");
 
@@ -650,8 +636,7 @@ fp_fintrz(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_fscale(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fscale(struct fp_ext *dest, struct fp_ext *src)
 {
 	int scale, oldround;
 
diff --git a/arch/m68k/math-emu/fp_arith.h b/arch/m68k/math-emu/fp_arith.h
index 0fd3ed217f66..3f9c58b6d504 100644
--- a/arch/m68k/math-emu/fp_arith.h
+++ b/arch/m68k/math-emu/fp_arith.h
@@ -12,39 +12,28 @@
 
  */
 
-#ifndef FP_ARITH_H
-#define FP_ARITH_H
+#ifndef _FP_ARITH_H
+#define _FP_ARITH_H
 
 /* easy ones */
-struct fp_ext *
-fp_fabs(struct fp_ext *dest, struct fp_ext *src);
-struct fp_ext *
-fp_fneg(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fabs(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fneg(struct fp_ext *dest, struct fp_ext *src);
 
 /* straightforward arithmetic */
-struct fp_ext *
-fp_fadd(struct fp_ext *dest, struct fp_ext *src);
-struct fp_ext *
-fp_fsub(struct fp_ext *dest, struct fp_ext *src);
-struct fp_ext *
-fp_fcmp(struct fp_ext *dest, struct fp_ext *src);
-struct fp_ext *
-fp_ftst(struct fp_ext *dest, struct fp_ext *src);
-struct fp_ext *
-fp_fmul(struct fp_ext *dest, struct fp_ext *src);
-struct fp_ext *
-fp_fdiv(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fadd(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fsub(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fcmp(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_ftst(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fmul(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fdiv(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fsglmul(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fsgldiv(struct fp_ext *dest, struct fp_ext *src);
 
 /* ones that do rounding and integer conversions */
-struct fp_ext *
-fp_fmod(struct fp_ext *dest, struct fp_ext *src);
-struct fp_ext *
-fp_frem(struct fp_ext *dest, struct fp_ext *src);
-struct fp_ext *
-fp_fint(struct fp_ext *dest, struct fp_ext *src);
-struct fp_ext *
-fp_fintrz(struct fp_ext *dest, struct fp_ext *src);
-struct fp_ext *
-fp_fscale(struct fp_ext *dest, struct fp_ext *src);
-
-#endif	/* FP_ARITH__H */
+struct fp_ext *fp_fmod(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_frem(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fint(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fintrz(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fscale(struct fp_ext *dest, struct fp_ext *src);
+
+#endif	/* _FP_ARITH_H */
diff --git a/arch/m68k/math-emu/fp_log.c b/arch/m68k/math-emu/fp_log.c
index 0663067870f2..71a8fc25575a 100644
--- a/arch/m68k/math-emu/fp_log.c
+++ b/arch/m68k/math-emu/fp_log.c
@@ -1,6 +1,6 @@
 /*
 
-  fp_trig.c: floating-point math routines for the Linux-m68k
+  fp_log.c: floating-point math routines for the Linux-m68k
   floating point emulator.
 
   Copyright (c) 1998-1999 David Huggins-Daines / Roman Zippel.
@@ -15,18 +15,15 @@
 
 */
 
+#include "fp_arith.h"
 #include "fp_emu.h"
+#include "fp_log.h"
 
-static const struct fp_ext fp_one =
-{
+static const struct fp_ext fp_one = {
 	.exp = 0x3fff,
 };
 
-extern struct fp_ext *fp_fadd(struct fp_ext *dest, const struct fp_ext *src);
-extern struct fp_ext *fp_fdiv(struct fp_ext *dest, const struct fp_ext *src);
-
-struct fp_ext *
-fp_fsqrt(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fsqrt(struct fp_ext *dest, struct fp_ext *src)
 {
 	struct fp_ext tmp, src2;
 	int i, exp;
@@ -70,7 +67,8 @@ fp_fsqrt(struct fp_ext *dest, struct fp_ext *src)
 	 *	sqrt(x) = 1 + 1/2*(x-1)
 	 *		= 1/2*(1+x)
 	 */
-	fp_fadd(dest, &fp_one);
+	/* It is safe to cast away the constness, as fp_one is normalized */
+	fp_fadd(dest, (struct fp_ext *)&fp_one);
 	dest->exp--;		/* * 1/2 */
 
 	/*
@@ -98,8 +96,7 @@ fp_fsqrt(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_fetoxm1(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fetoxm1(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("fetoxm1\n");
 
@@ -108,8 +105,7 @@ fp_fetoxm1(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_fetox(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fetox(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("fetox\n");
 
@@ -118,8 +114,7 @@ fp_fetox(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_ftwotox(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_ftwotox(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("ftwotox\n");
 
@@ -128,8 +123,7 @@ fp_ftwotox(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_ftentox(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_ftentox(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("ftentox\n");
 
@@ -138,8 +132,7 @@ fp_ftentox(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_flogn(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_flogn(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("flogn\n");
 
@@ -148,8 +141,7 @@ fp_flogn(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_flognp1(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_flognp1(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("flognp1\n");
 
@@ -158,8 +150,7 @@ fp_flognp1(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_flog10(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_flog10(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("flog10\n");
 
@@ -168,8 +159,7 @@ fp_flog10(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_flog2(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_flog2(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("flog2\n");
 
@@ -178,8 +168,7 @@ fp_flog2(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_fgetexp(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fgetexp(struct fp_ext *dest, struct fp_ext *src)
 {
 	dprint(PINSTR, "fgetexp\n");
 
@@ -199,8 +188,7 @@ fp_fgetexp(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_fgetman(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fgetman(struct fp_ext *dest, struct fp_ext *src)
 {
 	dprint(PINSTR, "fgetman\n");
 
diff --git a/arch/m68k/math-emu/fp_log.h b/arch/m68k/math-emu/fp_log.h
new file mode 100644
index 000000000000..c2bcfff11994
--- /dev/null
+++ b/arch/m68k/math-emu/fp_log.h
@@ -0,0 +1,44 @@
+/*
+
+  fp_log.h: floating-point math routines for the Linux-m68k
+  floating point emulator.
+
+  Copyright (c) 1998-1999 David Huggins-Daines / Roman Zippel.
+
+  I hereby give permission, free of charge, to copy, modify, and
+  redistribute this software, in source or binary form, provided that
+  the above copyright notice and the following disclaimer are included
+  in all such copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS", WITH ABSOLUTELY NO WARRANTY, REAL
+  OR IMPLIED.
+
+*/
+
+#ifndef _FP_LOG_H
+#define _FP_LOG_H
+
+#include "fp_emu.h"
+
+/* floating point logarithmic instructions:
+
+   the arguments to these are in the "internal" extended format, that
+   is, an "exploded" version of the 96-bit extended fp format used by
+   the 68881.
+
+   they return a status code, which should end up in %d0, if all goes
+   well.  */
+
+struct fp_ext *fp_fsqrt(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fetoxm1(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fetox(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_ftwotox(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_ftentox(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_flogn(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_flognp1(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_flog10(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_flog2(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fgetexp(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fgetman(struct fp_ext *dest, struct fp_ext *src);
+
+#endif /* _FP_LOG_H */
diff --git a/arch/m68k/math-emu/fp_trig.c b/arch/m68k/math-emu/fp_trig.c
index 6361d0784df2..5f49de373753 100644
--- a/arch/m68k/math-emu/fp_trig.c
+++ b/arch/m68k/math-emu/fp_trig.c
@@ -18,8 +18,7 @@
 #include "fp_emu.h"
 #include "fp_trig.h"
 
-struct fp_ext *
-fp_fsin(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fsin(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("fsin\n");
 
@@ -28,8 +27,7 @@ fp_fsin(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_fcos(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fcos(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("fcos\n");
 
@@ -38,8 +36,7 @@ fp_fcos(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_ftan(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_ftan(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("ftan\n");
 
@@ -48,8 +45,7 @@ fp_ftan(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_fasin(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fasin(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("fasin\n");
 
@@ -58,8 +54,7 @@ fp_fasin(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_facos(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_facos(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("facos\n");
 
@@ -68,8 +63,7 @@ fp_facos(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_fatan(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fatan(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("fatan\n");
 
@@ -78,8 +72,7 @@ fp_fatan(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_fsinh(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fsinh(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("fsinh\n");
 
@@ -88,8 +81,7 @@ fp_fsinh(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_fcosh(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fcosh(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("fcosh\n");
 
@@ -98,8 +90,7 @@ fp_fcosh(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_ftanh(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_ftanh(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("ftanh\n");
 
@@ -108,8 +99,7 @@ fp_ftanh(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_fatanh(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fatanh(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("fatanh\n");
 
@@ -118,64 +108,56 @@ fp_fatanh(struct fp_ext *dest, struct fp_ext *src)
 	return dest;
 }
 
-struct fp_ext *
-fp_fsincos0(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fsincos0(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("fsincos0\n");
 
 	return dest;
 }
 
-struct fp_ext *
-fp_fsincos1(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fsincos1(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("fsincos1\n");
 
 	return dest;
 }
 
-struct fp_ext *
-fp_fsincos2(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fsincos2(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("fsincos2\n");
 
 	return dest;
 }
 
-struct fp_ext *
-fp_fsincos3(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fsincos3(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("fsincos3\n");
 
 	return dest;
 }
 
-struct fp_ext *
-fp_fsincos4(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fsincos4(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("fsincos4\n");
 
 	return dest;
 }
 
-struct fp_ext *
-fp_fsincos5(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fsincos5(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("fsincos5\n");
 
 	return dest;
 }
 
-struct fp_ext *
-fp_fsincos6(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fsincos6(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("fsincos6\n");
 
 	return dest;
 }
 
-struct fp_ext *
-fp_fsincos7(struct fp_ext *dest, struct fp_ext *src)
+struct fp_ext *fp_fsincos7(struct fp_ext *dest, struct fp_ext *src)
 {
 	uprint("fsincos7\n");
 
diff --git a/arch/m68k/math-emu/fp_trig.h b/arch/m68k/math-emu/fp_trig.h
index af8b247e9c98..1aae8ab1d41b 100644
--- a/arch/m68k/math-emu/fp_trig.h
+++ b/arch/m68k/math-emu/fp_trig.h
@@ -15,8 +15,8 @@
 
 */
 
-#ifndef FP_TRIG_H
-#define FP_TRIG_H
+#ifndef _FP_TRIG_H
+#define _FP_TRIG_H
 
 #include "fp_emu.h"
 
@@ -29,4 +29,23 @@
    they return a status code, which should end up in %d0, if all goes
    well.  */
 
-#endif /* FP_TRIG__H */
+struct fp_ext *fp_fsin(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fcos(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_ftan(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fasin(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_facos(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fatan(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fsinh(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fcosh(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_ftanh(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fatanh(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fsincos0(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fsincos1(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fsincos2(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fsincos3(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fsincos4(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fsincos5(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fsincos6(struct fp_ext *dest, struct fp_ext *src);
+struct fp_ext *fp_fsincos7(struct fp_ext *dest, struct fp_ext *src);
+
+#endif /* _FP_TRIG_H */
diff --git a/arch/m68k/math-emu/multi_arith.h b/arch/m68k/math-emu/multi_arith.h
index 232f58fe3483..f7d9e49fe259 100644
--- a/arch/m68k/math-emu/multi_arith.h
+++ b/arch/m68k/math-emu/multi_arith.h
@@ -15,8 +15,10 @@
    implement the subset of integer arithmetic that we need in order to
    multiply, divide, and normalize 128-bit unsigned mantissae.  */
 
-#ifndef MULTI_ARITH_H
-#define MULTI_ARITH_H
+#ifndef _MULTI_ARITH_H
+#define _MULTI_ARITH_H
+
+#include "fp_emu.h"
 
 static inline void fp_denormalize(struct fp_ext *reg, unsigned int cnt)
 {
@@ -285,4 +287,4 @@ static inline void fp_putmant128(struct fp_ext *dest, union fp_mant128 *src,
 	}
 }
 
-#endif	/* MULTI_ARITH_H */
+#endif	/* _MULTI_ARITH_H */
diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c
index c290c5c0cfb9..fa3c5f38d989 100644
--- a/arch/m68k/mm/fault.c
+++ b/arch/m68k/mm/fault.c
@@ -17,6 +17,8 @@
 #include <asm/setup.h>
 #include <asm/traps.h>
 
+#include "fault.h"
+
 extern void die_if_kernel(char *, struct pt_regs *, long);
 
 int send_fault_sig(struct pt_regs *regs)
diff --git a/arch/m68k/mm/fault.h b/arch/m68k/mm/fault.h
new file mode 100644
index 000000000000..dab14ef7d4a1
--- /dev/null
+++ b/arch/m68k/mm/fault.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+struct pt_regs;
+
+int do_page_fault(struct pt_regs *regs, unsigned long address,
+		  unsigned long error_code);
+int send_fault_sig(struct pt_regs *regs);
diff --git a/arch/m68k/mm/hwtest.c b/arch/m68k/mm/hwtest.c
index fe99aa99987e..8ee7a3368688 100644
--- a/arch/m68k/mm/hwtest.c
+++ b/arch/m68k/mm/hwtest.c
@@ -26,6 +26,8 @@
 
 #include <linux/module.h>
 
+#include <asm/hwtest.h>
+
 int hwreg_present(volatile void *regp)
 {
 	int ret = 0;
diff --git a/arch/m68k/mm/sun3kmap.c b/arch/m68k/mm/sun3kmap.c
index 4f2a7ef8348b..ac091892d82f 100644
--- a/arch/m68k/mm/sun3kmap.c
+++ b/arch/m68k/mm/sun3kmap.c
@@ -18,11 +18,9 @@
 #include <asm/io.h>
 #include <asm/sun3mmu.h>
 
-#undef SUN3_KMAP_DEBUG
+#include "../sun3/sun3.h"
 
-#ifdef SUN3_KMAP_DEBUG
-extern void print_pte_vaddr(unsigned long vaddr);
-#endif
+#undef SUN3_KMAP_DEBUG
 
 extern void mmu_emu_map_pmeg (int context, int vaddr);
 
diff --git a/arch/m68k/mm/sun3mmu.c b/arch/m68k/mm/sun3mmu.c
index c5e6a23e0262..494739c1783e 100644
--- a/arch/m68k/mm/sun3mmu.c
+++ b/arch/m68k/mm/sun3mmu.c
@@ -24,7 +24,7 @@
 #include <asm/machdep.h>
 #include <asm/io.h>
 
-extern void mmu_emu_init (unsigned long bootmem_end);
+#include "../sun3/sun3.h"
 
 const char bad_pmd_string[] = "Bad pmd in pte_alloc: %08lx\n";
 
diff --git a/arch/m68k/mvme147/config.c b/arch/m68k/mvme147/config.c
index 4e6218115f43..8b5dc07f0811 100644
--- a/arch/m68k/mvme147/config.c
+++ b/arch/m68k/mvme147/config.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  arch/m68k/mvme147/config.c
  *
@@ -7,10 +8,6 @@
  * Based on:
  *
  *  Copyright (C) 1993 Hamish Macdonald
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file README.legal in the main directory of this archive
- * for more details.
  */
 
 #include <linux/types.h>
@@ -73,7 +70,7 @@ static void mvme147_get_model(char *model)
  * the mvme147 IRQ handling routines.
  */
 
-void __init mvme147_init_IRQ(void)
+static void __init mvme147_init_IRQ(void)
 {
 	m68k_setup_user_interrupt(VEC_USER, 192);
 }
diff --git a/arch/m68k/mvme16x/config.c b/arch/m68k/mvme16x/config.c
index f00c7aa058de..d1fbd1704d65 100644
--- a/arch/m68k/mvme16x/config.c
+++ b/arch/m68k/mvme16x/config.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  arch/m68k/mvme16x/config.c
  *
@@ -8,10 +9,6 @@
  *  linux/amiga/config.c
  *
  *  Copyright (C) 1993 Hamish Macdonald
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file README.legal in the main directory of this archive
- * for more details.
  */
 
 #include <linux/types.h>
@@ -38,6 +35,8 @@
 #include <asm/mvme16xhw.h>
 #include <asm/config.h>
 
+#include "mvme16x.h"
+
 extern t_bdid mvme_bdid;
 
 static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE;
@@ -208,7 +207,6 @@ static void __init mvme16x_init_IRQ (void)
 void mvme16x_cons_write(struct console *co, const char *str, unsigned count)
 {
 	volatile unsigned char *base_addr = (u_char *)CD2401_ADDR;
-	volatile u_char sink;
 	u_char ier;
 	int port;
 	u_char do_lf = 0;
@@ -229,7 +227,7 @@ void mvme16x_cons_write(struct console *co, const char *str, unsigned count)
 		if (in_8(PCCSCCTICR) & 0x20)
 		{
 			/* We have a Tx int. Acknowledge it */
-			sink = in_8(PCCTPIACKR);
+			in_8(PCCTPIACKR);
 			if ((base_addr[CyLICR] >> 2) == port) {
 				if (i == count) {
 					/* Last char of string is now output */
diff --git a/arch/m68k/mvme16x/mvme16x.h b/arch/m68k/mvme16x/mvme16x.h
new file mode 100644
index 000000000000..159c34b70039
--- /dev/null
+++ b/arch/m68k/mvme16x/mvme16x.h
@@ -0,0 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+struct console;
+
+/* config.c */
+void mvme16x_cons_write(struct console *co, const char *str, unsigned count);
diff --git a/arch/m68k/q40/config.c b/arch/m68k/q40/config.c
index c78ee709b458..de7870ad2a30 100644
--- a/arch/m68k/q40/config.c
+++ b/arch/m68k/q40/config.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  arch/m68k/q40/config.c
  *
@@ -6,10 +7,6 @@
  * originally based on:
  *
  *  linux/bvme/config.c
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file README.legal in the main directory of this archive
- * for more details.
  */
 
 #include <linux/errno.h>
@@ -36,16 +33,14 @@
 #include <asm/q40_master.h>
 #include <asm/config.h>
 
-extern void q40_init_IRQ(void);
+#include "q40.h"
+
 static void q40_get_model(char *model);
-extern void q40_sched_init(void);
 
 static int q40_hwclk(int, struct rtc_time *);
 static int q40_get_rtc_pll(struct rtc_pll_info *pll);
 static int q40_set_rtc_pll(struct rtc_pll_info *pll);
 
-extern void q40_mksound(unsigned int /*freq*/, unsigned int /*ticks*/);
-
 static void q40_mem_console_write(struct console *co, const char *b,
 				  unsigned int count);
 
diff --git a/arch/m68k/q40/q40.h b/arch/m68k/q40/q40.h
new file mode 100644
index 000000000000..3146679bde0d
--- /dev/null
+++ b/arch/m68k/q40/q40.h
@@ -0,0 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/* q40ints.c */
+void q40_init_IRQ(void);
+void q40_mksound(unsigned int hz, unsigned int ticks);
+void q40_sched_init(void);
diff --git a/arch/m68k/q40/q40ints.c b/arch/m68k/q40/q40ints.c
index 127d7ecdbd49..10f1f294e91f 100644
--- a/arch/m68k/q40/q40ints.c
+++ b/arch/m68k/q40/q40ints.c
@@ -24,6 +24,8 @@
 #include <asm/q40_master.h>
 #include <asm/q40ints.h>
 
+#include "q40.h"
+
 /*
  * Q40 IRQs are defined as follows:
  *            3,4,5,6,7,10,11,14,15 : ISA dev IRQs
diff --git a/arch/m68k/sun3/config.c b/arch/m68k/sun3/config.c
index 203f428a0344..cd8af809e0ca 100644
--- a/arch/m68k/sun3/config.c
+++ b/arch/m68k/sun3/config.c
@@ -17,6 +17,7 @@
 #include <linux/init.h>
 #include <linux/memblock.h>
 #include <linux/platform_device.h>
+#include <linux/linkage.h>
 
 #include <asm/oplib.h>
 #include <asm/setup.h>
@@ -32,12 +33,13 @@
 #include <asm/irq.h>
 #include <asm/sections.h>
 #include <asm/sun3ints.h>
+#include <asm/config.h>
+
+#include "sun3.h"
 
 char sun3_reserved_pmeg[SUN3_PMEGS_NUM];
 
 static void sun3_sched_init(void);
-extern void sun3_get_model (char* model);
-extern int sun3_hwclk(int set, struct rtc_time *t);
 
 volatile char* clock_va;
 extern unsigned long availmem;
@@ -48,7 +50,7 @@ static void sun3_get_hardware_list(struct seq_file *m)
 	seq_printf(m, "PROM Revision:\t%s\n", romvec->pv_monid);
 }
 
-void __init sun3_init(void)
+asmlinkage void __init sun3_init(void)
 {
 	unsigned char enable_register;
 	int i;
@@ -107,13 +109,10 @@ static void sun3_halt (void)
 static void __init sun3_bootmem_alloc(unsigned long memory_start,
 				      unsigned long memory_end)
 {
-	unsigned long start_page;
-
 	/* align start/end to page boundaries */
 	memory_start = ((memory_start + (PAGE_SIZE-1)) & PAGE_MASK);
 	memory_end = memory_end & PAGE_MASK;
 
-	start_page = __pa(memory_start) >> PAGE_SHIFT;
 	max_pfn = num_pages = __pa(memory_end) >> PAGE_SHIFT;
 
 	high_memory = (void *)memory_end;
@@ -200,7 +199,7 @@ static const struct resource sun3_scsi_rsrc[] __initconst = {
 	},
 };
 
-int __init sun3_platform_init(void)
+static int __init sun3_platform_init(void)
 {
 	switch (idprom->id_machtype) {
 	case SM_SUN3 | SM_3_160:
diff --git a/arch/m68k/sun3/idprom.c b/arch/m68k/sun3/idprom.c
index 1ace5353d78f..ca633a5f5eb1 100644
--- a/arch/m68k/sun3/idprom.c
+++ b/arch/m68k/sun3/idprom.c
@@ -17,6 +17,8 @@
 #include <asm/idprom.h>
 #include <asm/machines.h>  /* Fun with Sun released architectures. */
 
+#include "sun3.h"
+
 struct idprom *idprom;
 EXPORT_SYMBOL(idprom);
 
@@ -83,7 +85,7 @@ static void __init display_system_type(unsigned char machtype)
 	prom_halt();
 }
 
-void sun3_get_model(unsigned char* model)
+void sun3_get_model(char *model)
 {
 	register int i;
 
diff --git a/arch/m68k/sun3/intersil.c b/arch/m68k/sun3/intersil.c
index 8fc74864de81..29674cfa9bb3 100644
--- a/arch/m68k/sun3/intersil.c
+++ b/arch/m68k/sun3/intersil.c
@@ -17,6 +17,7 @@
 #include <asm/intersil.h>
 #include <asm/machdep.h>
 
+#include "sun3.h"
 
 /* bits to set for start/run of the intersil */
 #define STOP_VAL (INTERSIL_STOP | INTERSIL_INT_ENABLE | INTERSIL_24H_MODE)
diff --git a/arch/m68k/sun3/leds.c b/arch/m68k/sun3/leds.c
index 7c67b58ebf13..4bb95318fd54 100644
--- a/arch/m68k/sun3/leds.c
+++ b/arch/m68k/sun3/leds.c
@@ -3,6 +3,8 @@
 #include <asm/sun3mmu.h>
 #include <asm/io.h>
 
+#include "sun3.h"
+
 void sun3_leds(unsigned char byte)
 {
 	unsigned char dfc;
diff --git a/arch/m68k/sun3/mmu_emu.c b/arch/m68k/sun3/mmu_emu.c
index 7321b3b76283..119bd32efcfb 100644
--- a/arch/m68k/sun3/mmu_emu.c
+++ b/arch/m68k/sun3/mmu_emu.c
@@ -27,6 +27,7 @@
 #include <asm/mmu_context.h>
 #include <asm/dvma.h>
 
+#include "sun3.h"
 
 #undef DEBUG_MMU_EMU
 #define DEBUG_PROM_MAPS
@@ -67,7 +68,7 @@ static unsigned char ctx_avail = CONTEXTS_NUM-1;
 unsigned long rom_pages[256];
 
 /* Print a PTE value in symbolic form. For debugging. */
-void print_pte (pte_t pte)
+static void print_pte(pte_t pte)
 {
 #if 0
 	/* Verbose version. */
@@ -206,32 +207,32 @@ void __init mmu_emu_init(unsigned long bootmem_end)
    context for when they're cleared */
 void clear_context(unsigned long context)
 {
-     unsigned char oldctx;
-     unsigned long i;
+	unsigned char oldctx;
+	unsigned long i;
 
-     if(context) {
-	     if(!ctx_alloc[context])
-		     panic("%s: context not allocated\n", __func__);
+	if (context) {
+		if (!ctx_alloc[context])
+			panic("%s: context not allocated\n", __func__);
 
-	     ctx_alloc[context]->context = SUN3_INVALID_CONTEXT;
-	     ctx_alloc[context] = (struct mm_struct *)0;
-	     ctx_avail++;
-     }
+		ctx_alloc[context]->context = SUN3_INVALID_CONTEXT;
+		ctx_alloc[context] = (struct mm_struct *)0;
+		ctx_avail++;
+	}
 
-     oldctx = sun3_get_context();
+	oldctx = sun3_get_context();
 
-     sun3_put_context(context);
+	sun3_put_context(context);
 
-     for(i = 0; i < SUN3_INVALID_PMEG; i++) {
-	     if((pmeg_ctx[i] == context) && (pmeg_alloc[i] == 1)) {
-		     sun3_put_segmap(pmeg_vaddr[i], SUN3_INVALID_PMEG);
-		     pmeg_ctx[i] = 0;
-		     pmeg_alloc[i] = 0;
-		     pmeg_vaddr[i] = 0;
-	     }
-     }
+	for (i = 0; i < SUN3_INVALID_PMEG; i++) {
+		if ((pmeg_ctx[i] == context) && (pmeg_alloc[i] == 1)) {
+			sun3_put_segmap(pmeg_vaddr[i], SUN3_INVALID_PMEG);
+			pmeg_ctx[i] = 0;
+			pmeg_alloc[i] = 0;
+			pmeg_vaddr[i] = 0;
+		}
+	}
 
-     sun3_put_context(oldctx);
+	sun3_put_context(oldctx);
 }
 
 /* gets an empty context.  if full, kills the next context listed to
diff --git a/arch/m68k/sun3/prom/printf.c b/arch/m68k/sun3/prom/printf.c
index b6724cc66795..db5537ef1250 100644
--- a/arch/m68k/sun3/prom/printf.c
+++ b/arch/m68k/sun3/prom/printf.c
@@ -25,15 +25,14 @@ prom_printf(char *fmt, ...)
 {
 	va_list args;
 	char ch, *bptr;
-	int i;
 
 	va_start(args, fmt);
 
 #ifdef CONFIG_KGDB
 	ppbuf[0] = 'O';
-	i = vsprintf(ppbuf + 1, fmt, args) + 1;
+	vsprintf(ppbuf + 1, fmt, args) + 1;
 #else
-	i = vsprintf(ppbuf, fmt, args);
+	vsprintf(ppbuf, fmt, args);
 #endif
 
 	bptr = ppbuf;
diff --git a/arch/m68k/sun3/sun3.h b/arch/m68k/sun3/sun3.h
new file mode 100644
index 000000000000..8d98c0aaedc0
--- /dev/null
+++ b/arch/m68k/sun3/sun3.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#include <linux/linkage.h>
+
+struct rtc_time;
+
+/* config.c */
+asmlinkage void sun3_init(void);
+
+/* idprom.c */
+void sun3_get_model(char *model);
+
+/* intersil.c */
+int sun3_hwclk(int set, struct rtc_time *t);
+
+/* leds.c */
+void sun3_leds(unsigned char byte);
+
+/* mmu_emu.c */
+void mmu_emu_init(unsigned long bootmem_end);
+int mmu_emu_handle_fault(unsigned long vaddr, int read_flag, int kernel_fault);
+void print_pte_vaddr(unsigned long vaddr);
diff --git a/arch/m68k/sun3/sun3dvma.c b/arch/m68k/sun3/sun3dvma.c
index 4b560f4d3960..6ebf52740ad7 100644
--- a/arch/m68k/sun3/sun3dvma.c
+++ b/arch/m68k/sun3/sun3dvma.c
@@ -20,18 +20,6 @@
 
 #undef DVMA_DEBUG
 
-#ifdef CONFIG_SUN3X
-extern void dvma_unmap_iommu(unsigned long baddr, int len);
-#else
-static inline void dvma_unmap_iommu(unsigned long a, int b)
-{
-}
-#endif
-
-#ifdef CONFIG_SUN3
-extern void sun3_dvma_init(void);
-#endif
-
 static unsigned long *iommu_use;
 
 #define dvma_index(baddr) ((baddr - DVMA_START) >> DVMA_PAGE_SHIFT)
@@ -205,9 +193,7 @@ static inline int free_baddr(unsigned long baddr)
 	unsigned long len;
 	struct hole *hole;
 	struct list_head *cur;
-	unsigned long orig_baddr;
 
-	orig_baddr = baddr;
 	len = dvma_entry_use(baddr);
 	dvma_entry_use(baddr) = 0;
 	baddr &= DVMA_PAGE_MASK;
@@ -274,10 +260,7 @@ void __init dvma_init(void)
 
 	dvma_unmap_iommu(DVMA_START, DVMA_SIZE);
 
-#ifdef CONFIG_SUN3
 	sun3_dvma_init();
-#endif
-
 }
 
 unsigned long dvma_map_align(unsigned long kaddr, int len, int align)
diff --git a/arch/m68k/sun3/sun3ints.c b/arch/m68k/sun3/sun3ints.c
index 36cc280a4505..32eaf55f87be 100644
--- a/arch/m68k/sun3/sun3ints.c
+++ b/arch/m68k/sun3/sun3ints.c
@@ -17,7 +17,7 @@
 #include <asm/irq_regs.h>
 #include <linux/seq_file.h>
 
-extern void sun3_leds (unsigned char);
+#include "sun3.h"
 
 void sun3_disable_interrupts(void)
 {
@@ -29,11 +29,11 @@ void sun3_enable_interrupts(void)
 	sun3_enable_irq(0);
 }
 
-static int led_pattern[8] = {
-       ~(0x80), ~(0x01),
-       ~(0x40), ~(0x02),
-       ~(0x20), ~(0x04),
-       ~(0x10), ~(0x08)
+static unsigned char led_pattern[8] = {
+	(u8)~(0x80), (u8)~(0x01),
+	(u8)~(0x40), (u8)~(0x02),
+	(u8)~(0x20), (u8)~(0x04),
+	(u8)~(0x10), (u8)~(0x08)
 };
 
 volatile unsigned char* sun3_intreg;
diff --git a/arch/m68k/sun3x/config.c b/arch/m68k/sun3x/config.c
index 37121a0f1253..798ea72a0ea3 100644
--- a/arch/m68k/sun3x/config.c
+++ b/arch/m68k/sun3x/config.c
@@ -19,14 +19,14 @@
 #include <asm/sun3ints.h>
 #include <asm/setup.h>
 #include <asm/oplib.h>
+#include <asm/config.h>
 
 #include "time.h"
+#include "../sun3/sun3.h"
 
 volatile char *clock_va;
 
-extern void sun3_get_model(char *model);
-
-void sun3_leds(unsigned int i)
+void sun3_leds(unsigned char byte)
 {
 
 }
diff --git a/arch/m68k/sun3x/dvma.c b/arch/m68k/sun3x/dvma.c
index a6034ba05845..5185b4818d40 100644
--- a/arch/m68k/sun3x/dvma.c
+++ b/arch/m68k/sun3x/dvma.c
@@ -60,7 +60,7 @@ static volatile unsigned long *iommu_pte = (unsigned long *)SUN3X_IOMMU;
 
 #ifdef DEBUG
 /* code to print out a dvma mapping for debugging purposes */
-void dvma_print (unsigned long dvma_addr)
+static void dvma_print (unsigned long dvma_addr)
 {
 
 	unsigned long index;
@@ -143,8 +143,7 @@ inline int dvma_map_cpu(unsigned long kaddr,
 }
 
 
-inline int dvma_map_iommu(unsigned long kaddr, unsigned long baddr,
-				 int len)
+int dvma_map_iommu(unsigned long kaddr, unsigned long baddr, int len)
 {
 	unsigned long end, index;
 
diff --git a/arch/m68k/sun3x/prom.c b/arch/m68k/sun3x/prom.c
index 64c23bfaa90c..8ac87d3dc607 100644
--- a/arch/m68k/sun3x/prom.c
+++ b/arch/m68k/sun3x/prom.c
@@ -30,7 +30,7 @@ struct linux_romvec *romvec;
 e_vector *sun3x_prom_vbr;
 
 /* Handle returning to the prom */
-void sun3x_halt(void)
+static void sun3x_halt(void)
 {
 	unsigned long flags;