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   - unicore32 and hexagon both have very outdated gcc releases, but the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, 237 deletions

diff --git a/arch/score/mm/fault.c b/arch/score/mm/fault.c
deleted file mode 100644
index b85fad4f0874..000000000000
--- a/arch/score/mm/fault.c
+++ /dev/null
@@ -1,237 +0,0 @@
-/*
- * arch/score/mm/fault.c
- *
- * Score Processor version.
- *
- * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
- *  Lennox Wu <lennox.wu@sunplusct.com>
- *  Chen Liqin <liqin.chen@sunplusct.com>
- *
- * 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.
- *
- * This program 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#include <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/mman.h>
-#include <linux/extable.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/ptrace.h>
-#include <linux/uaccess.h>
-
-/*
- * This routine handles page faults.  It determines the address,
- * and the problem, and then passes it off to one of the appropriate
- * routines.
- */
-asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write,
-				unsigned long address)
-{
-	struct vm_area_struct *vma = NULL;
-	struct task_struct *tsk = current;
-	struct mm_struct *mm = tsk->mm;
-	const int field = sizeof(unsigned long) * 2;
-	unsigned long flags = 0;
-	siginfo_t info;
-	int fault;
-
-	info.si_code = SEGV_MAPERR;
-
-	/*
-	* We fault-in kernel-space virtual memory on-demand. The
-	* 'reference' page table is init_mm.pgd.
-	*
-	* NOTE! We MUST NOT take any locks for this case. We may
-	* be in an interrupt or a critical region, and should
-	* only copy the information from the master page table,
-	* nothing more.
-	*/
-	if (unlikely(address >= VMALLOC_START && address <= VMALLOC_END))
-		goto vmalloc_fault;
-#ifdef MODULE_START
-	if (unlikely(address >= MODULE_START && address < MODULE_END))
-		goto vmalloc_fault;
-#endif
-
-	/*
-	* If we're in an interrupt or have no user
-	* context, we must not take the fault..
-	*/
-	if (pagefault_disabled() || !mm)
-		goto bad_area_nosemaphore;
-
-	if (user_mode(regs))
-		flags |= FAULT_FLAG_USER;
-
-	down_read(&mm->mmap_sem);
-	vma = find_vma(mm, address);
-	if (!vma)
-		goto bad_area;
-	if (vma->vm_start <= address)
-		goto good_area;
-	if (!(vma->vm_flags & VM_GROWSDOWN))
-		goto bad_area;
-	if (expand_stack(vma, address))
-		goto bad_area;
-	/*
-	* Ok, we have a good vm_area for this memory access, so
-	* we can handle it..
-	 */
-good_area:
-	info.si_code = SEGV_ACCERR;
-
-	if (write) {
-		if (!(vma->vm_flags & VM_WRITE))
-			goto bad_area;
-		flags |= FAULT_FLAG_WRITE;
-	} else {
-		if (!(vma->vm_flags & (VM_READ | VM_WRITE | VM_EXEC)))
-			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 (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 (fault & VM_FAULT_MAJOR)
-		tsk->maj_flt++;
-	else
-		tsk->min_flt++;
-
-	up_read(&mm->mmap_sem);
-	return;
-
-	/*
-	* Something tried to access memory that isn't in our memory map..
-	* Fix it, but check if it's kernel or user first..
-	 */
-bad_area:
-	up_read(&mm->mmap_sem);
-
-bad_area_nosemaphore:
-	/* User mode accesses just cause a SIGSEGV */
-	if (user_mode(regs)) {
-		tsk->thread.cp0_badvaddr = address;
-		tsk->thread.error_code = write;
-		info.si_signo = SIGSEGV;
-		info.si_errno = 0;
-		/* info.si_code has been set above */
-		info.si_addr = (void __user *) address;
-		force_sig_info(SIGSEGV, &info, tsk);
-		return;
-	}
-
-no_context:
-	/* Are we prepared to handle this kernel fault? */
-	if (fixup_exception(regs)) {
-		current->thread.cp0_baduaddr = address;
-		return;
-	}
-
-	/*
-	* Oops. The kernel tried to access some bad page. We'll have to
-	* terminate things with extreme prejudice.
-	*/
-	bust_spinlocks(1);
-
-	printk(KERN_ALERT "CPU %d Unable to handle kernel paging request at "
-			"virtual address %0*lx, epc == %0*lx, ra == %0*lx\n",
-			0, field, address, field, regs->cp0_epc,
-			field, regs->regs[3]);
-	die("Oops", regs);
-
-	/*
-	* 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))
-		goto no_context;
-	pagefault_out_of_memory();
-	return;
-
-do_sigbus:
-	up_read(&mm->mmap_sem);
-	/* Kernel mode? Handle exceptions or die */
-	if (!user_mode(regs))
-		goto no_context;
-	else
-	/*
-	* Send a sigbus, regardless of whether we were in kernel
-	* or user mode.
-	*/
-	tsk->thread.cp0_badvaddr = address;
-	info.si_signo = SIGBUS;
-	info.si_errno = 0;
-	info.si_code = BUS_ADRERR;
-	info.si_addr = (void __user *) address;
-	force_sig_info(SIGBUS, &info, tsk);
-	return;
-vmalloc_fault:
-	{
-		/*
-		* 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_offset(address);
-		pgd_t *pgd, *pgd_k;
-		pud_t *pud, *pud_k;
-		pmd_t *pmd, *pmd_k;
-		pte_t *pte_k;
-
-		pgd = (pgd_t *) pgd_current + offset;
-		pgd_k = init_mm.pgd + offset;
-
-		if (!pgd_present(*pgd_k))
-			goto no_context;
-		set_pgd(pgd, *pgd_k);
-
-		pud = pud_offset(pgd, address);
-		pud_k = pud_offset(pgd_k, address);
-		if (!pud_present(*pud_k))
-			goto no_context;
-
-		pmd = pmd_offset(pud, address);
-		pmd_k = pmd_offset(pud_k, address);
-		if (!pmd_present(*pmd_k))
-			goto no_context;
-		set_pmd(pmd, *pmd_k);
-
-		pte_k = pte_offset_kernel(pmd_k, address);
-		if (!pte_present(*pte_k))
-			goto no_context;
-		return;
-	}
-}