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   - unicore32 and hexagon both have very outdated gcc releases, but the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, 386 deletions

diff --git a/arch/mn10300/kernel/ptrace.c b/arch/mn10300/kernel/ptrace.c
deleted file mode 100644
index 8009876a7ac4..000000000000
--- a/arch/mn10300/kernel/ptrace.c
+++ /dev/null
@@ -1,386 +0,0 @@
-/* MN10300 Process tracing
- *
- * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- * Modified by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/sched/task_stack.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/user.h>
-#include <linux/regset.h>
-#include <linux/elf.h>
-#include <linux/tracehook.h>
-#include <linux/uaccess.h>
-#include <asm/pgtable.h>
-#include <asm/processor.h>
-#include <asm/cacheflush.h>
-#include <asm/fpu.h>
-#include <asm/asm-offsets.h>
-
-/*
- * translate ptrace register IDs into struct pt_regs offsets
- */
-static const u8 ptrace_regid_to_frame[] = {
-	[PT_A3 << 2]		= REG_A3,
-	[PT_A2 << 2]		= REG_A2,
-	[PT_D3 << 2]		= REG_D3,
-	[PT_D2 << 2]		= REG_D2,
-	[PT_MCVF << 2]		= REG_MCVF,
-	[PT_MCRL << 2]		= REG_MCRL,
-	[PT_MCRH << 2]		= REG_MCRH,
-	[PT_MDRQ << 2]		= REG_MDRQ,
-	[PT_E1 << 2]		= REG_E1,
-	[PT_E0 << 2]		= REG_E0,
-	[PT_E7 << 2]		= REG_E7,
-	[PT_E6 << 2]		= REG_E6,
-	[PT_E5 << 2]		= REG_E5,
-	[PT_E4 << 2]		= REG_E4,
-	[PT_E3 << 2]		= REG_E3,
-	[PT_E2 << 2]		= REG_E2,
-	[PT_SP << 2]		= REG_SP,
-	[PT_LAR << 2]		= REG_LAR,
-	[PT_LIR << 2]		= REG_LIR,
-	[PT_MDR << 2]		= REG_MDR,
-	[PT_A1 << 2]		= REG_A1,
-	[PT_A0 << 2]		= REG_A0,
-	[PT_D1 << 2]		= REG_D1,
-	[PT_D0 << 2]		= REG_D0,
-	[PT_ORIG_D0 << 2]	= REG_ORIG_D0,
-	[PT_EPSW << 2]		= REG_EPSW,
-	[PT_PC << 2]		= REG_PC,
-};
-
-static inline int get_stack_long(struct task_struct *task, int offset)
-{
-	return *(unsigned long *)
-		((unsigned long) task->thread.uregs + offset);
-}
-
-static inline
-int put_stack_long(struct task_struct *task, int offset, unsigned long data)
-{
-	unsigned long stack;
-
-	stack = (unsigned long) task->thread.uregs + offset;
-	*(unsigned long *) stack = data;
-	return 0;
-}
-
-/*
- * retrieve the contents of MN10300 userspace general registers
- */
-static int genregs_get(struct task_struct *target,
-		       const struct user_regset *regset,
-		       unsigned int pos, unsigned int count,
-		       void *kbuf, void __user *ubuf)
-{
-	const struct pt_regs *regs = task_pt_regs(target);
-	int ret;
-
-	/* we need to skip regs->next */
-	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
-				  regs, 0, PT_ORIG_D0 * sizeof(long));
-	if (ret < 0)
-		return ret;
-
-	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
-				  &regs->orig_d0, PT_ORIG_D0 * sizeof(long),
-				  NR_PTREGS * sizeof(long));
-	if (ret < 0)
-		return ret;
-
-	return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
-					NR_PTREGS * sizeof(long), -1);
-}
-
-/*
- * update the contents of the MN10300 userspace general registers
- */
-static int genregs_set(struct task_struct *target,
-		       const struct user_regset *regset,
-		       unsigned int pos, unsigned int count,
-		       const void *kbuf, const void __user *ubuf)
-{
-	struct pt_regs *regs = task_pt_regs(target);
-	unsigned long tmp;
-	int ret;
-
-	/* we need to skip regs->next */
-	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
-				 regs, 0, PT_ORIG_D0 * sizeof(long));
-	if (ret < 0)
-		return ret;
-
-	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
-				 &regs->orig_d0, PT_ORIG_D0 * sizeof(long),
-				 PT_EPSW * sizeof(long));
-	if (ret < 0)
-		return ret;
-
-	/* we need to mask off changes to EPSW */
-	tmp = regs->epsw;
-	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
-				 &tmp, PT_EPSW * sizeof(long),
-				 PT_PC * sizeof(long));
-	tmp &= EPSW_FLAG_V | EPSW_FLAG_C | EPSW_FLAG_N | EPSW_FLAG_Z;
-	tmp |= regs->epsw & ~(EPSW_FLAG_V | EPSW_FLAG_C | EPSW_FLAG_N |
-			      EPSW_FLAG_Z);
-	regs->epsw = tmp;
-
-	if (ret < 0)
-		return ret;
-
-	/* and finally load the PC */
-	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
-				 &regs->pc, PT_PC * sizeof(long),
-				 NR_PTREGS * sizeof(long));
-
-	if (ret < 0)
-		return ret;
-
-	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-					 NR_PTREGS * sizeof(long), -1);
-}
-
-/*
- * retrieve the contents of MN10300 userspace FPU registers
- */
-static int fpuregs_get(struct task_struct *target,
-		       const struct user_regset *regset,
-		       unsigned int pos, unsigned int count,
-		       void *kbuf, void __user *ubuf)
-{
-	const struct fpu_state_struct *fpregs = &target->thread.fpu_state;
-	int ret;
-
-	unlazy_fpu(target);
-
-	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
-				  fpregs, 0, sizeof(*fpregs));
-	if (ret < 0)
-		return ret;
-
-	return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
-					sizeof(*fpregs), -1);
-}
-
-/*
- * update the contents of the MN10300 userspace FPU registers
- */
-static int fpuregs_set(struct task_struct *target,
-		       const struct user_regset *regset,
-		       unsigned int pos, unsigned int count,
-		       const void *kbuf, const void __user *ubuf)
-{
-	struct fpu_state_struct fpu_state = target->thread.fpu_state;
-	int ret;
-
-	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
-				 &fpu_state, 0, sizeof(fpu_state));
-	if (ret < 0)
-		return ret;
-
-	fpu_kill_state(target);
-	target->thread.fpu_state = fpu_state;
-	set_using_fpu(target);
-
-	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-					 sizeof(fpu_state), -1);
-}
-
-/*
- * determine if the FPU registers have actually been used
- */
-static int fpuregs_active(struct task_struct *target,
-			  const struct user_regset *regset)
-{
-	return is_using_fpu(target) ? regset->n : 0;
-}
-
-/*
- * Define the register sets available on the MN10300 under Linux
- */
-enum mn10300_regset {
-	REGSET_GENERAL,
-	REGSET_FPU,
-};
-
-static const struct user_regset mn10300_regsets[] = {
-	/*
-	 * General register format is:
-	 *	A3, A2, D3, D2, MCVF, MCRL, MCRH, MDRQ
-	 *	E1, E0, E7...E2, SP, LAR, LIR, MDR
-	 *	A1, A0, D1, D0, ORIG_D0, EPSW, PC
-	 */
-	[REGSET_GENERAL] = {
-		.core_note_type	= NT_PRSTATUS,
-		.n		= ELF_NGREG,
-		.size		= sizeof(long),
-		.align		= sizeof(long),
-		.get		= genregs_get,
-		.set		= genregs_set,
-	},
-	/*
-	 * FPU register format is:
-	 *	FS0-31, FPCR
-	 */
-	[REGSET_FPU] = {
-		.core_note_type	= NT_PRFPREG,
-		.n		= sizeof(struct fpu_state_struct) / sizeof(long),
-		.size		= sizeof(long),
-		.align		= sizeof(long),
-		.get		= fpuregs_get,
-		.set		= fpuregs_set,
-		.active		= fpuregs_active,
-	},
-};
-
-static const struct user_regset_view user_mn10300_native_view = {
-	.name		= "mn10300",
-	.e_machine	= EM_MN10300,
-	.regsets	= mn10300_regsets,
-	.n		= ARRAY_SIZE(mn10300_regsets),
-};
-
-const struct user_regset_view *task_user_regset_view(struct task_struct *task)
-{
-	return &user_mn10300_native_view;
-}
-
-/*
- * set the single-step bit
- */
-void user_enable_single_step(struct task_struct *child)
-{
-#ifndef CONFIG_MN10300_USING_JTAG
-	struct user *dummy = NULL;
-	long tmp;
-
-	tmp = get_stack_long(child, (unsigned long) &dummy->regs.epsw);
-	tmp |= EPSW_T;
-	put_stack_long(child, (unsigned long) &dummy->regs.epsw, tmp);
-#endif
-}
-
-/*
- * make sure the single-step bit is not set
- */
-void user_disable_single_step(struct task_struct *child)
-{
-#ifndef CONFIG_MN10300_USING_JTAG
-	struct user *dummy = NULL;
-	long tmp;
-
-	tmp = get_stack_long(child, (unsigned long) &dummy->regs.epsw);
-	tmp &= ~EPSW_T;
-	put_stack_long(child, (unsigned long) &dummy->regs.epsw, tmp);
-#endif
-}
-
-void ptrace_disable(struct task_struct *child)
-{
-	user_disable_single_step(child);
-}
-
-/*
- * handle the arch-specific side of process tracing
- */
-long arch_ptrace(struct task_struct *child, long request,
-		 unsigned long addr, unsigned long data)
-{
-	unsigned long tmp;
-	int ret;
-	unsigned long __user *datap = (unsigned long __user *) data;
-
-	switch (request) {
-	/* read the word at location addr in the USER area. */
-	case PTRACE_PEEKUSR:
-		ret = -EIO;
-		if ((addr & 3) || addr > sizeof(struct user) - 3)
-			break;
-
-		tmp = 0;  /* Default return condition */
-		if (addr < NR_PTREGS << 2)
-			tmp = get_stack_long(child,
-					     ptrace_regid_to_frame[addr]);
-		ret = put_user(tmp, datap);
-		break;
-
-		/* write the word at location addr in the USER area */
-	case PTRACE_POKEUSR:
-		ret = -EIO;
-		if ((addr & 3) || addr > sizeof(struct user) - 3)
-			break;
-
-		ret = 0;
-		if (addr < NR_PTREGS << 2)
-			ret = put_stack_long(child, ptrace_regid_to_frame[addr],
-					     data);
-		break;
-
-	case PTRACE_GETREGS:	/* Get all integer regs from the child. */
-		return copy_regset_to_user(child, &user_mn10300_native_view,
-					   REGSET_GENERAL,
-					   0, NR_PTREGS * sizeof(long),
-					   datap);
-
-	case PTRACE_SETREGS:	/* Set all integer regs in the child. */
-		return copy_regset_from_user(child, &user_mn10300_native_view,
-					     REGSET_GENERAL,
-					     0, NR_PTREGS * sizeof(long),
-					     datap);
-
-	case PTRACE_GETFPREGS:	/* Get the child FPU state. */
-		return copy_regset_to_user(child, &user_mn10300_native_view,
-					   REGSET_FPU,
-					   0, sizeof(struct fpu_state_struct),
-					   datap);
-
-	case PTRACE_SETFPREGS:	/* Set the child FPU state. */
-		return copy_regset_from_user(child, &user_mn10300_native_view,
-					     REGSET_FPU,
-					     0, sizeof(struct fpu_state_struct),
-					     datap);
-
-	default:
-		ret = ptrace_request(child, request, addr, data);
-		break;
-	}
-
-	return ret;
-}
-
-/*
- * handle tracing of system call entry
- * - return the revised system call number or ULONG_MAX to cause ENOSYS
- */
-asmlinkage unsigned long syscall_trace_entry(struct pt_regs *regs)
-{
-	if (tracehook_report_syscall_entry(regs))
-		/* tracing decided this syscall should not happen, so
-		 * We'll return a bogus call number to get an ENOSYS
-		 * error, but leave the original number in
-		 * regs->orig_d0
-		 */
-		return ULONG_MAX;
-
-	return regs->orig_d0;
-}
-
-/*
- * handle tracing of system call exit
- */
-asmlinkage void syscall_trace_exit(struct pt_regs *regs)
-{
-	tracehook_report_syscall_exit(regs, 0);
-}