Merge tag 'metag_remove_2' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jhogan/metag into asm-generic

Remove metag architecture

These patches remove the metag architecture and tightly dependent
drivers from the kernel. With the 4.16 kernel the ancient gcc 4.2.4
based metag toolchain we have been using is hitting compiler bugs, so
now seems a good time to drop it altogether.

* tag 'metag_remove_2' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jhogan/metag:
  i2c: img-scb: Drop METAG dependency
  media: img-ir: Drop METAG dependency
  watchdog: imgpdc: Drop METAG dependency
  MAINTAINERS/CREDITS: Drop METAG ARCHITECTURE
  tty: Remove metag DA TTY and console driver
  clocksource: Remove metag generic timer driver
  irqchip: Remove metag irqchip drivers
  Drop a bunch of metag references
  docs: Remove remaining references to metag
  docs: Remove metag docs
  metag: Remove arch/metag/

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 247 deletions

diff --git a/arch/metag/mm/fault.c b/arch/metag/mm/fault.c
deleted file mode 100644
index de54fe686080..000000000000
--- a/arch/metag/mm/fault.c
+++ /dev/null
@@ -1,247 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- *  Meta page fault handling.
- *
- *  Copyright (C) 2005-2012 Imagination Technologies Ltd.
- */
-
-#include <linux/mman.h>
-#include <linux/mm.h>
-#include <linux/kernel.h>
-#include <linux/ptrace.h>
-#include <linux/sched/debug.h>
-#include <linux/interrupt.h>
-#include <linux/uaccess.h>
-
-#include <asm/tlbflush.h>
-#include <asm/mmu.h>
-#include <asm/traps.h>
-
-/* Clear any pending catch buffer state. */
-static void clear_cbuf_entry(struct pt_regs *regs, unsigned long addr,
-			     unsigned int trapno)
-{
-	PTBICTXEXTCB0 cbuf = regs->extcb0;
-
-	switch (trapno) {
-		/* Instruction fetch faults leave no catch buffer state. */
-	case TBIXXF_SIGNUM_IGF:
-	case TBIXXF_SIGNUM_IPF:
-		return;
-	default:
-		if (cbuf[0].CBAddr == addr) {
-			cbuf[0].CBAddr = 0;
-			cbuf[0].CBFlags &= ~TXCATCH0_FAULT_BITS;
-
-			/* And, as this is the ONLY catch entry, we
-			 * need to clear the cbuf bit from the context!
-			 */
-			regs->ctx.SaveMask &= ~(TBICTX_CBUF_BIT |
-						TBICTX_XCBF_BIT);
-
-			return;
-		}
-		pr_err("Failed to clear cbuf entry!\n");
-	}
-}
-
-int show_unhandled_signals = 1;
-
-int do_page_fault(struct pt_regs *regs, unsigned long address,
-		  unsigned int write_access, unsigned int trapno)
-{
-	struct task_struct *tsk;
-	struct mm_struct *mm;
-	struct vm_area_struct *vma, *prev_vma;
-	siginfo_t info;
-	int fault;
-	unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
-
-	tsk = current;
-
-	if ((address >= VMALLOC_START) && (address < VMALLOC_END)) {
-		/*
-		 * Synchronize this task's top level page-table
-		 * with the 'reference' page table.
-		 *
-		 * Do _not_ use "tsk" here. We might be inside
-		 * an interrupt in the middle of a task switch..
-		 */
-		int offset = pgd_index(address);
-		pgd_t *pgd, *pgd_k;
-		pud_t *pud, *pud_k;
-		pmd_t *pmd, *pmd_k;
-		pte_t *pte_k;
-
-		pgd = ((pgd_t *)mmu_get_base()) + offset;
-		pgd_k = swapper_pg_dir + offset;
-
-		/* This will never happen with the folded page table. */
-		if (!pgd_present(*pgd)) {
-			if (!pgd_present(*pgd_k))
-				goto bad_area_nosemaphore;
-			set_pgd(pgd, *pgd_k);
-			return 0;
-		}
-
-		pud = pud_offset(pgd, address);
-		pud_k = pud_offset(pgd_k, address);
-		if (!pud_present(*pud_k))
-			goto bad_area_nosemaphore;
-		set_pud(pud, *pud_k);
-
-		pmd = pmd_offset(pud, address);
-		pmd_k = pmd_offset(pud_k, address);
-		if (!pmd_present(*pmd_k))
-			goto bad_area_nosemaphore;
-		set_pmd(pmd, *pmd_k);
-
-		pte_k = pte_offset_kernel(pmd_k, address);
-		if (!pte_present(*pte_k))
-			goto bad_area_nosemaphore;
-
-		/* May only be needed on Chorus2 */
-		flush_tlb_all();
-		return 0;
-	}
-
-	mm = tsk->mm;
-
-	if (faulthandler_disabled() || !mm)
-		goto no_context;
-
-	if (user_mode(regs))
-		flags |= FAULT_FLAG_USER;
-retry:
-	down_read(&mm->mmap_sem);
-
-	vma = find_vma_prev(mm, address, &prev_vma);
-
-	if (!vma || address < vma->vm_start)
-		goto check_expansion;
-
-good_area:
-	if (write_access) {
-		if (!(vma->vm_flags & VM_WRITE))
-			goto bad_area;
-		flags |= FAULT_FLAG_WRITE;
-	} else {
-		if (!(vma->vm_flags & (VM_READ | VM_EXEC | VM_WRITE)))
-			goto bad_area;
-	}
-
-	/*
-	 * If for any reason at all we couldn't handle the fault,
-	 * make sure we exit gracefully rather than endlessly redo
-	 * the fault.
-	 */
-	fault = handle_mm_fault(vma, address, flags);
-
-	if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current))
-		return 0;
-
-	if (unlikely(fault & VM_FAULT_ERROR)) {
-		if (fault & VM_FAULT_OOM)
-			goto out_of_memory;
-		else if (fault & VM_FAULT_SIGSEGV)
-			goto bad_area;
-		else if (fault & VM_FAULT_SIGBUS)
-			goto do_sigbus;
-		BUG();
-	}
-	if (flags & FAULT_FLAG_ALLOW_RETRY) {
-		if (fault & VM_FAULT_MAJOR)
-			tsk->maj_flt++;
-		else
-			tsk->min_flt++;
-		if (fault & VM_FAULT_RETRY) {
-			flags &= ~FAULT_FLAG_ALLOW_RETRY;
-			flags |= FAULT_FLAG_TRIED;
-
-			/*
-			 * No need to up_read(&mm->mmap_sem) as we would
-			 * have already released it in __lock_page_or_retry
-			 * in mm/filemap.c.
-			 */
-
-			goto retry;
-		}
-	}
-
-	up_read(&mm->mmap_sem);
-	return 0;
-
-check_expansion:
-	vma = prev_vma;
-	if (vma && (expand_stack(vma, address) == 0))
-		goto good_area;
-
-bad_area:
-	up_read(&mm->mmap_sem);
-
-bad_area_nosemaphore:
-	if (user_mode(regs)) {
-		info.si_signo = SIGSEGV;
-		info.si_errno = 0;
-		info.si_code = SEGV_MAPERR;
-		info.si_addr = (__force void __user *)address;
-		info.si_trapno = trapno;
-
-		if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
-		    printk_ratelimit()) {
-			printk("%s%s[%d]: segfault at %lx pc %08x sp %08x write %d trap %#x (%s)",
-			       task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG,
-			       tsk->comm, task_pid_nr(tsk), address,
-			       regs->ctx.CurrPC, regs->ctx.AX[0].U0,
-			       write_access, trapno, trap_name(trapno));
-			print_vma_addr(" in ", regs->ctx.CurrPC);
-			print_vma_addr(" rtp in ", regs->ctx.DX[4].U1);
-			printk("\n");
-			show_regs(regs);
-		}
-		force_sig_info(SIGSEGV, &info, tsk);
-		return 1;
-	}
-	goto no_context;
-
-do_sigbus:
-	up_read(&mm->mmap_sem);
-
-	/*
-	 * Send a sigbus, regardless of whether we were in kernel
-	 * or user mode.
-	 */
-	info.si_signo = SIGBUS;
-	info.si_errno = 0;
-	info.si_code = BUS_ADRERR;
-	info.si_addr = (__force void __user *)address;
-	info.si_trapno = trapno;
-	force_sig_info(SIGBUS, &info, tsk);
-
-	/* Kernel mode? Handle exceptions or die */
-	if (!user_mode(regs))
-		goto no_context;
-
-	return 1;
-
-	/*
-	 * We ran out of memory, or some other thing happened to us that made
-	 * us unable to handle the page fault gracefully.
-	 */
-out_of_memory:
-	up_read(&mm->mmap_sem);
-	if (user_mode(regs)) {
-		pagefault_out_of_memory();
-		return 1;
-	}
-
-no_context:
-	/* Are we prepared to handle this kernel fault?  */
-	if (fixup_exception(regs)) {
-		clear_cbuf_entry(regs, address, trapno);
-		return 1;
-	}
-
-	die("Oops", regs, (write_access << 15) | trapno, address);
-	do_exit(SIGKILL);
-}