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   - unicore32 and hexagon both have very outdated gcc releases, but the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, 431 deletions

diff --git a/arch/mn10300/kernel/signal.c b/arch/mn10300/kernel/signal.c
deleted file mode 100644
index 2f3cb5734235..000000000000
--- a/arch/mn10300/kernel/signal.c
+++ /dev/null
@@ -1,431 +0,0 @@
-/* MN10300 Signal handling
- *
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- * Written 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/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/kernel.h>
-#include <linux/signal.h>
-#include <linux/errno.h>
-#include <linux/wait.h>
-#include <linux/ptrace.h>
-#include <linux/unistd.h>
-#include <linux/stddef.h>
-#include <linux/tty.h>
-#include <linux/personality.h>
-#include <linux/suspend.h>
-#include <linux/tracehook.h>
-#include <asm/cacheflush.h>
-#include <asm/ucontext.h>
-#include <linux/uaccess.h>
-#include <asm/fpu.h>
-#include "sigframe.h"
-
-#define DEBUG_SIG 0
-
-/*
- * do a signal return; undo the signal stack.
- */
-static int restore_sigcontext(struct pt_regs *regs,
-			      struct sigcontext __user *sc, long *_d0)
-{
-	unsigned int err = 0;
-
-	/* Always make any pending restarted system calls return -EINTR */
-	current->restart_block.fn = do_no_restart_syscall;
-
-	if (is_using_fpu(current))
-		fpu_kill_state(current);
-
-#define COPY(x) err |= __get_user(regs->x, &sc->x)
-	COPY(d1); COPY(d2); COPY(d3);
-	COPY(a0); COPY(a1); COPY(a2); COPY(a3);
-	COPY(e0); COPY(e1); COPY(e2); COPY(e3);
-	COPY(e4); COPY(e5); COPY(e6); COPY(e7);
-	COPY(lar); COPY(lir);
-	COPY(mdr); COPY(mdrq);
-	COPY(mcvf); COPY(mcrl); COPY(mcrh);
-	COPY(sp); COPY(pc);
-#undef COPY
-
-	{
-		unsigned int tmpflags;
-#ifndef CONFIG_MN10300_USING_JTAG
-#define USER_EPSW (EPSW_FLAG_Z | EPSW_FLAG_N | EPSW_FLAG_C | EPSW_FLAG_V | \
-		   EPSW_T | EPSW_nAR)
-#else
-#define USER_EPSW (EPSW_FLAG_Z | EPSW_FLAG_N | EPSW_FLAG_C | EPSW_FLAG_V | \
-		   EPSW_nAR)
-#endif
-		err |= __get_user(tmpflags, &sc->epsw);
-		regs->epsw = (regs->epsw & ~USER_EPSW) |
-		  (tmpflags & USER_EPSW);
-		regs->orig_d0 = -1;		/* disable syscall checks */
-	}
-
-	{
-		struct fpucontext *buf;
-		err |= __get_user(buf, &sc->fpucontext);
-		if (buf) {
-			if (!access_ok(VERIFY_READ, buf, sizeof(*buf)))
-				goto badframe;
-			err |= fpu_restore_sigcontext(buf);
-		}
-	}
-
-	err |= __get_user(*_d0, &sc->d0);
-	return err;
-
-badframe:
-	return 1;
-}
-
-/*
- * standard signal return syscall
- */
-asmlinkage long sys_sigreturn(void)
-{
-	struct sigframe __user *frame;
-	sigset_t set;
-	long d0;
-
-	frame = (struct sigframe __user *) current_frame()->sp;
-	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
-		goto badframe;
-	if (__get_user(set.sig[0], &frame->sc.oldmask))
-		goto badframe;
-
-	if (_NSIG_WORDS > 1 &&
-	    __copy_from_user(&set.sig[1], &frame->extramask,
-			     sizeof(frame->extramask)))
-		goto badframe;
-
-	set_current_blocked(&set);
-
-	if (restore_sigcontext(current_frame(), &frame->sc, &d0))
-		goto badframe;
-
-	return d0;
-
-badframe:
-	force_sig(SIGSEGV, current);
-	return 0;
-}
-
-/*
- * realtime signal return syscall
- */
-asmlinkage long sys_rt_sigreturn(void)
-{
-	struct rt_sigframe __user *frame;
-	sigset_t set;
-	long d0;
-
-	frame = (struct rt_sigframe __user *) current_frame()->sp;
-	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
-		goto badframe;
-	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
-		goto badframe;
-
-	set_current_blocked(&set);
-
-	if (restore_sigcontext(current_frame(), &frame->uc.uc_mcontext, &d0))
-		goto badframe;
-
-	if (restore_altstack(&frame->uc.uc_stack))
-		goto badframe;
-
-	return d0;
-
-badframe:
-	force_sig(SIGSEGV, current);
-	return 0;
-}
-
-/*
- * store the userspace context into a signal frame
- */
-static int setup_sigcontext(struct sigcontext __user *sc,
-			    struct fpucontext *fpuctx,
-			    struct pt_regs *regs,
-			    unsigned long mask)
-{
-	int tmp, err = 0;
-
-#define COPY(x) err |= __put_user(regs->x, &sc->x)
-	COPY(d0); COPY(d1); COPY(d2); COPY(d3);
-	COPY(a0); COPY(a1); COPY(a2); COPY(a3);
-	COPY(e0); COPY(e1); COPY(e2); COPY(e3);
-	COPY(e4); COPY(e5); COPY(e6); COPY(e7);
-	COPY(lar); COPY(lir);
-	COPY(mdr); COPY(mdrq);
-	COPY(mcvf); COPY(mcrl); COPY(mcrh);
-	COPY(sp); COPY(epsw); COPY(pc);
-#undef COPY
-
-	tmp = fpu_setup_sigcontext(fpuctx);
-	if (tmp < 0)
-		err = 1;
-	else
-		err |= __put_user(tmp ? fpuctx : NULL, &sc->fpucontext);
-
-	/* non-iBCS2 extensions.. */
-	err |= __put_user(mask, &sc->oldmask);
-
-	return err;
-}
-
-/*
- * determine which stack to use..
- */
-static inline void __user *get_sigframe(struct ksignal *ksig,
-					struct pt_regs *regs,
-					size_t frame_size)
-{
-	unsigned long sp = sigsp(regs->sp, ksig);
-
-	return (void __user *) ((sp - frame_size) & ~7UL);
-}
-
-/*
- * set up a normal signal frame
- */
-static int setup_frame(struct ksignal *ksig, sigset_t *set,
-		       struct pt_regs *regs)
-{
-	struct sigframe __user *frame;
-	int sig = ksig->sig;
-
-	frame = get_sigframe(ksig, regs, sizeof(*frame));
-
-	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
-		return -EFAULT;
-
-	if (__put_user(sig, &frame->sig) < 0 ||
-	    __put_user(&frame->sc, &frame->psc) < 0)
-		return -EFAULT;
-
-	if (setup_sigcontext(&frame->sc, &frame->fpuctx, regs, set->sig[0]))
-		return -EFAULT;
-
-	if (_NSIG_WORDS > 1) {
-		if (__copy_to_user(frame->extramask, &set->sig[1],
-				   sizeof(frame->extramask)))
-			return -EFAULT;
-	}
-
-	/* set up to return from userspace.  If provided, use a stub already in
-	 * userspace */
-	if (ksig->ka.sa.sa_flags & SA_RESTORER) {
-		if (__put_user(ksig->ka.sa.sa_restorer, &frame->pretcode))
-			return -EFAULT;
-	} else {
-		if (__put_user((void (*)(void))frame->retcode,
-			       &frame->pretcode))
-			return -EFAULT;
-		/* this is mov $,d0; syscall 0 */
-		if (__put_user(0x2c, (char *)(frame->retcode + 0)) ||
-		    __put_user(__NR_sigreturn, (char *)(frame->retcode + 1)) ||
-		    __put_user(0x00, (char *)(frame->retcode + 2)) ||
-		    __put_user(0xf0, (char *)(frame->retcode + 3)) ||
-		    __put_user(0xe0, (char *)(frame->retcode + 4)))
-			return -EFAULT;
-		flush_icache_range((unsigned long) frame->retcode,
-				   (unsigned long) frame->retcode + 5);
-	}
-
-	/* set up registers for signal handler */
-	regs->sp = (unsigned long) frame;
-	regs->pc = (unsigned long) ksig->ka.sa.sa_handler;
-	regs->d0 = sig;
-	regs->d1 = (unsigned long) &frame->sc;
-
-#if DEBUG_SIG
-	printk(KERN_DEBUG "SIG deliver %d (%s:%d): sp=%p pc=%lx ra=%p\n",
-	       sig, current->comm, current->pid, frame, regs->pc,
-	       frame->pretcode);
-#endif
-
-	return 0;
-}
-
-/*
- * set up a realtime signal frame
- */
-static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
-			  struct pt_regs *regs)
-{
-	struct rt_sigframe __user *frame;
-	int sig = ksig->sig;
-
-	frame = get_sigframe(ksig, regs, sizeof(*frame));
-
-	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
-		return -EFAULT;
-
-	if (__put_user(sig, &frame->sig) ||
-	    __put_user(&frame->info, &frame->pinfo) ||
-	    __put_user(&frame->uc, &frame->puc) ||
-	    copy_siginfo_to_user(&frame->info, &ksig->info))
-		return -EFAULT;
-
-	/* create the ucontext.  */
-	if (__put_user(0, &frame->uc.uc_flags) ||
-	    __put_user(0, &frame->uc.uc_link) ||
-	    __save_altstack(&frame->uc.uc_stack, regs->sp) ||
-	    setup_sigcontext(&frame->uc.uc_mcontext,
-			     &frame->fpuctx, regs, set->sig[0]) ||
-	    __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)))
-		return -EFAULT;
-
-	/* set up to return from userspace.  If provided, use a stub already in
-	 * userspace */
-	if (ksig->ka.sa.sa_flags & SA_RESTORER) {
-		if (__put_user(ksig->ka.sa.sa_restorer, &frame->pretcode))
-			return -EFAULT;
-
-	} else {
-		if (__put_user((void(*)(void))frame->retcode,
-			       &frame->pretcode) ||
-		    /* This is mov $,d0; syscall 0 */
-		    __put_user(0x2c, (char *)(frame->retcode + 0)) ||
-		    __put_user(__NR_rt_sigreturn,
-			       (char *)(frame->retcode + 1)) ||
-		    __put_user(0x00, (char *)(frame->retcode + 2)) ||
-		    __put_user(0xf0, (char *)(frame->retcode + 3)) ||
-		    __put_user(0xe0, (char *)(frame->retcode + 4)))
-			return -EFAULT;
-
-		flush_icache_range((u_long) frame->retcode,
-				   (u_long) frame->retcode + 5);
-	}
-
-	/* Set up registers for signal handler */
-	regs->sp = (unsigned long) frame;
-	regs->pc = (unsigned long) ksig->ka.sa.sa_handler;
-	regs->d0 = sig;
-	regs->d1 = (long) &frame->info;
-
-#if DEBUG_SIG
-	printk(KERN_DEBUG "SIG deliver %d (%s:%d): sp=%p pc=%lx ra=%p\n",
-	       sig, current->comm, current->pid, frame, regs->pc,
-	       frame->pretcode);
-#endif
-
-	return 0;
-}
-
-static inline void stepback(struct pt_regs *regs)
-{
-	regs->pc -= 2;
-	regs->orig_d0 = -1;
-}
-
-/*
- * handle the actual delivery of a signal to userspace
- */
-static int handle_signal(struct ksignal *ksig, struct pt_regs *regs)
-{
-	sigset_t *oldset = sigmask_to_save();
-	int ret;
-
-	/* Are we from a system call? */
-	if (regs->orig_d0 >= 0) {
-		/* If so, check system call restarting.. */
-		switch (regs->d0) {
-		case -ERESTART_RESTARTBLOCK:
-		case -ERESTARTNOHAND:
-			regs->d0 = -EINTR;
-			break;
-
-		case -ERESTARTSYS:
-			if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {
-				regs->d0 = -EINTR;
-				break;
-			}
-
-			/* fallthrough */
-		case -ERESTARTNOINTR:
-			regs->d0 = regs->orig_d0;
-			stepback(regs);
-		}
-	}
-
-	/* Set up the stack frame */
-	if (ksig->ka.sa.sa_flags & SA_SIGINFO)
-		ret = setup_rt_frame(ksig, oldset, regs);
-	else
-		ret = setup_frame(ksig, oldset, regs);
-
-	signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP));
-	return 0;
-}
-
-/*
- * handle a potential signal
- */
-static void do_signal(struct pt_regs *regs)
-{
-	struct ksignal ksig;
-
-	if (get_signal(&ksig)) {
-		handle_signal(&ksig, regs);
-		return;
-	}
-
-	/* did we come from a system call? */
-	if (regs->orig_d0 >= 0) {
-		/* restart the system call - no handlers present */
-		switch (regs->d0) {
-		case -ERESTARTNOHAND:
-		case -ERESTARTSYS:
-		case -ERESTARTNOINTR:
-			regs->d0 = regs->orig_d0;
-			stepback(regs);
-			break;
-
-		case -ERESTART_RESTARTBLOCK:
-			regs->d0 = __NR_restart_syscall;
-			stepback(regs);
-			break;
-		}
-	}
-
-	/* if there's no signal to deliver, we just put the saved sigmask
-	 * back */
-	restore_saved_sigmask();
-}
-
-/*
- * notification of userspace execution resumption
- * - triggered by current->work.notify_resume
- */
-asmlinkage void do_notify_resume(struct pt_regs *regs, u32 thread_info_flags)
-{
-	/* Pending single-step? */
-	if (thread_info_flags & _TIF_SINGLESTEP) {
-#ifndef CONFIG_MN10300_USING_JTAG
-		regs->epsw |= EPSW_T;
-		clear_thread_flag(TIF_SINGLESTEP);
-#else
-		BUG(); /* no h/w single-step if using JTAG unit */
-#endif
-	}
-
-	/* deal with pending signal delivery */
-	if (thread_info_flags & _TIF_SIGPENDING)
-		do_signal(regs);
-
-	if (thread_info_flags & _TIF_NOTIFY_RESUME) {
-		clear_thread_flag(TIF_NOTIFY_RESUME);
-		tracehook_notify_resume(current_frame());
-	}
-}