Merge tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pul removal of obsolete architecture ports from Arnd Bergmann:
 "This removes the entire architecture code for blackfin, cris, frv,
  m32r, metag, mn10300, score, and tile, including the associated device
  drivers.

  I have been working with the (former) maintainers for each one to
  ensure that my interpretation was right and the code is definitely
  unused in mainline kernels. Many had fond memories of working on the
  respective ports to start with and getting them included in upstream,
  but also saw no point in keeping the port alive without any users.

  In the end, it seems that while the eight architectures are extremely
  different, they all suffered the same fate: There was one company in
  charge of an SoC line, a CPU microarchitecture and a software
  ecosystem, which was more costly than licensing newer off-the-shelf
  CPU cores from a third party (typically ARM, MIPS, or RISC-V). It
  seems that all the SoC product lines are still around, but have not
  used the custom CPU architectures for several years at this point. In
  contrast, CPU instruction sets that remain popular and have actively
  maintained kernel ports tend to all be used across multiple licensees.

  [ See the new nds32 port merged in the previous commit for the next
    generation of "one company in charge of an SoC line, a CPU
    microarchitecture and a software ecosystem"   - Linus ]

  The removal came out of a discussion that is now documented at
  https://lwn.net/Articles/748074/. Unlike the original plans, I'm not
  marking any ports as deprecated but remove them all at once after I
  made sure that they are all unused. Some architectures (notably tile,
  mn10300, and blackfin) are still being shipped in products with old
  kernels, but those products will never be updated to newer kernel
  releases.

  After this series, we still have a few architectures without mainline
  gcc support:

   - unicore32 and hexagon both have very outdated gcc releases, but the
     maintainers promised to work on providing something newer. At least
     in case of hexagon, this will only be llvm, not gcc.

   - openrisc, risc-v and nds32 are still in the process of finishing
     their support or getting it added to mainline gcc in the first
     place. They all have patched gcc-7.3 ports that work to some
     degree, but complete upstream support won't happen before gcc-8.1.
     Csky posted their first kernel patch set last week, their situation
     will be similar

  [ Palmer Dabbelt points out that RISC-V support is in mainline gcc
    since gcc-7, although gcc-7.3.0 is the recommended minimum  - Linus ]"

This really says it all:

 2498 files changed, 95 insertions(+), 467668 deletions(-)

* tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (74 commits)
  MAINTAINERS: UNICORE32: Change email account
  staging: iio: remove iio-trig-bfin-timer driver
  tty: hvc: remove tile driver
  tty: remove bfin_jtag_comm and hvc_bfin_jtag drivers
  serial: remove tile uart driver
  serial: remove m32r_sio driver
  serial: remove blackfin drivers
  serial: remove cris/etrax uart drivers
  usb: Remove Blackfin references in USB support
  usb: isp1362: remove blackfin arch glue
  usb: musb: remove blackfin port
  usb: host: remove tilegx platform glue
  pwm: remove pwm-bfin driver
  i2c: remove bfin-twi driver
  spi: remove blackfin related host drivers
  watchdog: remove bfin_wdt driver
  can: remove bfin_can driver
  mmc: remove bfin_sdh driver
  input: misc: remove blackfin rotary driver
  input: keyboard: remove bf54x driver
  ...

1 files changed, 0 insertions, 146 deletions

diff --git a/arch/frv/include/asm/gdb-stub.h b/arch/frv/include/asm/gdb-stub.h
deleted file mode 100644
index e6bedd0cd9a5..000000000000
--- a/arch/frv/include/asm/gdb-stub.h
+++ /dev/null
@@ -1,146 +0,0 @@
-/* gdb-stub.h: FRV GDB stub
- *
- * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- * - Derived from asm-mips/gdb-stub.h (c) 1995 Andreas Busse
- *
- * This program 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 of the License, or (at your option) any later version.
- */
-#ifndef __ASM_GDB_STUB_H
-#define __ASM_GDB_STUB_H
-
-#undef GDBSTUB_DEBUG_IO
-#undef GDBSTUB_DEBUG_PROTOCOL
-
-#include <asm/ptrace.h>
-
-/*
- * important register numbers in GDB protocol
- * - GR0,  GR1,  GR2,  GR3,  GR4,  GR5,  GR6,  GR7,
- * - GR8,  GR9,  GR10, GR11, GR12, GR13, GR14, GR15,
- * - GR16, GR17, GR18, GR19, GR20, GR21, GR22, GR23,
- * - GR24, GR25, GR26, GR27, GR28, GR29, GR30, GR31,
- * - GR32, GR33, GR34, GR35, GR36, GR37, GR38, GR39,
- * - GR40, GR41, GR42, GR43, GR44, GR45, GR46, GR47,
- * - GR48, GR49, GR50, GR51, GR52, GR53, GR54, GR55,
- * - GR56, GR57, GR58, GR59, GR60, GR61, GR62, GR63,
- * - FR0,  FR1,  FR2,  FR3,  FR4,  FR5,  FR6,  FR7,
- * - FR8,  FR9,  FR10, FR11, FR12, FR13, FR14, FR15,
- * - FR16, FR17, FR18, FR19, FR20, FR21, FR22, FR23,
- * - FR24, FR25, FR26, FR27, FR28, FR29, FR30, FR31,
- * - FR32, FR33, FR34, FR35, FR36, FR37, FR38, FR39,
- * - FR40, FR41, FR42, FR43, FR44, FR45, FR46, FR47,
- * - FR48, FR49, FR50, FR51, FR52, FR53, FR54, FR55,
- * - FR56, FR57, FR58, FR59, FR60, FR61, FR62, FR63,
- * - PC, PSR, CCR, CCCR,
- * - _X132, _X133, _X134
- * - TBR, BRR, DBAR0, DBAR1, DBAR2, DBAR3,
- * - SCR0, SCR1, SCR2, SCR3,
- * - LR, LCR,
- * - IACC0H, IACC0L,
- * - FSR0,
- * - ACC0, ACC1, ACC2, ACC3, ACC4, ACC5, ACC6, ACC7,
- * - ACCG0123, ACCG4567,
- * - MSR0, MSR1,
- * - GNER0, GNER1,
- * - FNER0, FNER1,
- */
-#define GDB_REG_GR(N)	(N)
-#define GDB_REG_FR(N)	(64+(N))
-#define GDB_REG_PC	128
-#define GDB_REG_PSR	129
-#define GDB_REG_CCR	130
-#define GDB_REG_CCCR	131
-#define GDB_REG_TBR	135
-#define GDB_REG_BRR	136
-#define GDB_REG_DBAR(N)	(137+(N))
-#define GDB_REG_SCR(N)	(141+(N))
-#define GDB_REG_LR	145
-#define GDB_REG_LCR	146
-#define GDB_REG_FSR0	149
-#define GDB_REG_ACC(N)	(150+(N))
-#define GDB_REG_ACCG(N)	(158+(N)/4)
-#define GDB_REG_MSR(N)	(160+(N))
-#define GDB_REG_GNER(N)	(162+(N))
-#define GDB_REG_FNER(N)	(164+(N))
-
-#define GDB_REG_SP	GDB_REG_GR(1)
-#define GDB_REG_FP	GDB_REG_GR(2)
-
-#ifndef _LANGUAGE_ASSEMBLY
-
-/*
- * Prototypes
- */
-extern void show_registers_only(struct pt_regs *regs);
-
-extern void gdbstub_init(void);
-extern void gdbstub(int type);
-extern void gdbstub_exit(int status);
-
-extern void gdbstub_io_init(void);
-extern void gdbstub_set_baud(unsigned baud);
-extern int gdbstub_rx_char(unsigned char *_ch, int nonblock);
-extern void gdbstub_tx_char(unsigned char ch);
-extern void gdbstub_tx_flush(void);
-extern void gdbstub_do_rx(void);
-
-extern asmlinkage void __debug_stub_init_break(void);
-extern asmlinkage void __break_hijack_kernel_event(void);
-extern asmlinkage void __break_hijack_kernel_event_breaks_here(void);
-
-extern asmlinkage void gdbstub_rx_handler(void);
-extern asmlinkage void gdbstub_rx_irq(void);
-extern asmlinkage void gdbstub_intercept(void);
-
-extern uint32_t __entry_usertrap_table[];
-extern uint32_t __entry_kerneltrap_table[];
-
-extern volatile u8	gdbstub_rx_buffer[PAGE_SIZE];
-extern volatile u32	gdbstub_rx_inp;
-extern volatile u32	gdbstub_rx_outp;
-extern volatile u8	gdbstub_rx_overflow;
-extern u8		gdbstub_rx_unget;
-
-extern void gdbstub_printk(const char *fmt, ...);
-extern void debug_to_serial(const char *p, int n);
-extern void console_set_baud(unsigned baud);
-
-#ifdef GDBSTUB_DEBUG_IO
-#define gdbstub_io(FMT,...) gdbstub_printk(FMT, ##__VA_ARGS__)
-#else
-#define gdbstub_io(FMT,...) ({ 0; })
-#endif
-
-#ifdef GDBSTUB_DEBUG_PROTOCOL
-#define gdbstub_proto(FMT,...) gdbstub_printk(FMT,##__VA_ARGS__)
-#else
-#define gdbstub_proto(FMT,...) ({ 0; })
-#endif
-
-/*
- * we dedicate GR31 to keeping a pointer to the gdbstub exception frame
- * - gr31 is destroyed on entry to the gdbstub if !MMU
- * - gr31 is saved in scr3 on entry to the gdbstub if in !MMU
- */
-register struct frv_frame0 *__debug_frame0 asm("gr31");
-
-#define __debug_frame		(&__debug_frame0->regs)
-#define __debug_user_context	(&__debug_frame0->uc)
-#define __debug_regs		(&__debug_frame0->debug)
-#define __debug_reg(X)		((unsigned long *) ((unsigned long) &__debug_frame0 + (X)))
-
-struct frv_debug_status {
-	unsigned long		bpsr;
-	unsigned long		dcr;
-	unsigned long		brr;
-	unsigned long		nmar;
-};
-
-extern struct frv_debug_status __debug_status;
-
-#endif /* _LANGUAGE_ASSEMBLY */
-#endif /* __ASM_GDB_STUB_H */