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   - unicore32 and hexagon both have very outdated gcc releases, but the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, 134 deletions

diff --git a/arch/cris/arch-v10/kernel/traps.c b/arch/cris/arch-v10/kernel/traps.c
deleted file mode 100644
index 876d45b957f4..000000000000
--- a/arch/cris/arch-v10/kernel/traps.c
+++ /dev/null
@@ -1,134 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Helper functions for trap handlers
- *
- * Copyright (C) 2000-2007, Axis Communications AB.
- *
- * Authors:   Bjorn Wesen
- *            Hans-Peter Nilsson
- *
- */
-
-#include <linux/ptrace.h>
-#include <linux/uaccess.h>
-#include <linux/sched/debug.h>
-
-#include <arch/sv_addr_ag.h>
-#include <arch/system.h>
-
-void
-show_registers(struct pt_regs *regs)
-{
-	/*
-	 * It's possible to use either the USP register or current->thread.usp.
-	 * USP might not correspond to the current process for all cases this
-	 * function is called, and current->thread.usp isn't up to date for the
-	 * current process. Experience shows that using USP is the way to go.
-	 */
-	unsigned long usp = rdusp();
-
-	printk("IRP: %08lx SRP: %08lx DCCR: %08lx USP: %08lx MOF: %08lx\n",
-	       regs->irp, regs->srp, regs->dccr, usp, regs->mof);
-
-	printk(" r0: %08lx  r1: %08lx   r2: %08lx  r3: %08lx\n",
-	       regs->r0, regs->r1, regs->r2, regs->r3);
-
-	printk(" r4: %08lx  r5: %08lx   r6: %08lx  r7: %08lx\n",
-	       regs->r4, regs->r5, regs->r6, regs->r7);
-
-	printk(" r8: %08lx  r9: %08lx  r10: %08lx r11: %08lx\n",
-	       regs->r8, regs->r9, regs->r10, regs->r11);
-
-	printk("r12: %08lx r13: %08lx oR10: %08lx  sp: %08lx\n",
-	       regs->r12, regs->r13, regs->orig_r10, (long unsigned)regs);
-
-	printk("R_MMU_CAUSE: %08lx\n", (unsigned long)*R_MMU_CAUSE);
-
-	printk("Process %s (pid: %d, stackpage=%08lx)\n",
-	       current->comm, current->pid, (unsigned long)current);
-
-	/*
-	 * When in-kernel, we also print out the stack and code at the
-	 * time of the fault..
-	 */
-	if (!user_mode(regs)) {
-		int i;
-
-		show_stack(NULL, (unsigned long *)usp);
-
-		/*
-		 * If the previous stack-dump wasn't a kernel one, dump the
-		 * kernel stack now.
-		 */
-		if (usp != 0)
-			show_stack(NULL, NULL);
-
-		printk("\nCode: ");
-
-		if (regs->irp < PAGE_OFFSET)
-			goto bad_value;
-
-		/*
-		 * Quite often the value at regs->irp doesn't point to the
-		 * interesting instruction, which often is the previous
-		 * instruction. So dump at an offset large enough that the
-		 * instruction decoding should be in sync at the interesting
-		 * point, but small enough to fit on a row. The regs->irp
-		 * location is pointed out in a ksymoops-friendly way by
-		 * wrapping the byte for that address in parenthesises.
-		 */
-		for (i = -12; i < 12; i++) {
-			unsigned char c;
-
-			if (__get_user(c, &((unsigned char *)regs->irp)[i])) {
-bad_value:
-				printk(" Bad IP value.");
-				break;
-			}
-
-			if (i == 0)
-				printk("(%02x) ", c);
-			else
-				printk("%02x ", c);
-		}
-		printk("\n");
-	}
-}
-
-void
-arch_enable_nmi(void)
-{
-	asm volatile ("setf m");
-}
-
-extern void (*nmi_handler)(struct pt_regs *);
-void handle_nmi(struct pt_regs *regs)
-{
-	if (nmi_handler)
-		nmi_handler(regs);
-
-	/* Wait until nmi is no longer active. (We enable NMI immediately after
-	   returning from this function, and we don't want it happening while
-	   exiting from the NMI interrupt handler.) */
-	while (*R_IRQ_MASK0_RD & IO_STATE(R_IRQ_MASK0_RD, nmi_pin, active))
-		;
-}
-
-#ifdef CONFIG_DEBUG_BUGVERBOSE
-void
-handle_BUG(struct pt_regs *regs)
-{
-	struct bug_frame f;
-	unsigned char c;
-	unsigned long irp = regs->irp;
-
-	if (__copy_from_user(&f, (const void __user *)(irp - 8), sizeof f))
-		return;
-	if (f.prefix != BUG_PREFIX || f.magic != BUG_MAGIC)
-		return;
-	if (__get_user(c, f.filename))
-		f.filename = "<bad filename>";
-
-	printk("kernel BUG at %s:%d!\n", f.filename, f.line);
-}
-#endif