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   - unicore32 and hexagon both have very outdated gcc releases, but the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, 367 deletions

diff --git a/arch/tile/lib/memcpy_64.c b/arch/tile/lib/memcpy_64.c
deleted file mode 100644
index 4815354b8cd2c..0000000000000
--- a/arch/tile/lib/memcpy_64.c
+++ /dev/null
@@ -1,367 +0,0 @@
-/*
- * Copyright 2011 Tilera Corporation. All Rights Reserved.
- *
- *   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, version 2.
- *
- *   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, GOOD TITLE or
- *   NON INFRINGEMENT.  See the GNU General Public License for
- *   more details.
- */
-
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/module.h>
-/* EXPORT_SYMBOL() is in arch/tile/lib/exports.c since this should be asm. */
-
-/* Must be 8 bytes in size. */
-#define op_t uint64_t
-
-/* Threshold value for when to enter the unrolled loops. */
-#define	OP_T_THRES	16
-
-#if CHIP_L2_LINE_SIZE() != 64
-#error "Assumes 64 byte line size"
-#endif
-
-/* How many cache lines ahead should we prefetch? */
-#define PREFETCH_LINES_AHEAD 4
-
-/*
- * Provide "base versions" of load and store for the normal code path.
- * The kernel provides other versions for userspace copies.
- */
-#define ST(p, v) (*(p) = (v))
-#define LD(p) (*(p))
-
-#ifndef USERCOPY_FUNC
-#define ST1 ST
-#define ST2 ST
-#define ST4 ST
-#define ST8 ST
-#define LD1 LD
-#define LD2 LD
-#define LD4 LD
-#define LD8 LD
-#define RETVAL dstv
-void *memcpy(void *__restrict dstv, const void *__restrict srcv, size_t n)
-#else
-/*
- * Special kernel version will provide implementation of the LDn/STn
- * macros to return a count of uncopied bytes due to mm fault.
- */
-#define RETVAL 0
-int __attribute__((optimize("omit-frame-pointer")))
-USERCOPY_FUNC(void *__restrict dstv, const void *__restrict srcv, size_t n)
-#endif
-{
-	char *__restrict dst1 = (char *)dstv;
-	const char *__restrict src1 = (const char *)srcv;
-	const char *__restrict src1_end;
-	const char *__restrict prefetch;
-	op_t *__restrict dst8;    /* 8-byte pointer to destination memory. */
-	op_t final; /* Final bytes to write to trailing word, if any */
-	long i;
-
-	if (n < 16) {
-		for (; n; n--)
-			ST1(dst1++, LD1(src1++));
-		return RETVAL;
-	}
-
-	/*
-	 * Locate the end of source memory we will copy.  Don't
-	 * prefetch past this.
-	 */
-	src1_end = src1 + n - 1;
-
-	/* Prefetch ahead a few cache lines, but not past the end. */
-	prefetch = src1;
-	for (i = 0; i < PREFETCH_LINES_AHEAD; i++) {
-		__insn_prefetch(prefetch);
-		prefetch += CHIP_L2_LINE_SIZE();
-		prefetch = (prefetch < src1_end) ? prefetch : src1;
-	}
-
-	/* Copy bytes until dst is word-aligned. */
-	for (; (uintptr_t)dst1 & (sizeof(op_t) - 1); n--)
-		ST1(dst1++, LD1(src1++));
-
-	/* 8-byte pointer to destination memory. */
-	dst8 = (op_t *)dst1;
-
-	if (__builtin_expect((uintptr_t)src1 & (sizeof(op_t) - 1), 0)) {
-		/* Unaligned copy. */
-
-		op_t  tmp0 = 0, tmp1 = 0, tmp2, tmp3;
-		const op_t *src8 = (const op_t *) ((uintptr_t)src1 &
-						   -sizeof(op_t));
-		const void *srci = (void *)src1;
-		int m;
-
-		m = (CHIP_L2_LINE_SIZE() << 2) -
-			(((uintptr_t)dst8) & ((CHIP_L2_LINE_SIZE() << 2) - 1));
-		m = (n < m) ? n : m;
-		m /= sizeof(op_t);
-
-		/* Copy until 'dst' is cache-line-aligned. */
-		n -= (sizeof(op_t) * m);
-
-		switch (m % 4) {
-		case 0:
-			if (__builtin_expect(!m, 0))
-				goto _M0;
-			tmp1 = LD8(src8++);
-			tmp2 = LD8(src8++);
-			goto _8B3;
-		case 2:
-			m += 2;
-			tmp3 = LD8(src8++);
-			tmp0 = LD8(src8++);
-			goto _8B1;
-		case 3:
-			m += 1;
-			tmp2 = LD8(src8++);
-			tmp3 = LD8(src8++);
-			goto _8B2;
-		case 1:
-			m--;
-			tmp0 = LD8(src8++);
-			tmp1 = LD8(src8++);
-			if (__builtin_expect(!m, 0))
-				goto _8B0;
-		}
-
-		do {
-			tmp2 = LD8(src8++);
-			tmp0 =  __insn_dblalign(tmp0, tmp1, srci);
-			ST8(dst8++, tmp0);
-_8B3:
-			tmp3 = LD8(src8++);
-			tmp1 = __insn_dblalign(tmp1, tmp2, srci);
-			ST8(dst8++, tmp1);
-_8B2:
-			tmp0 = LD8(src8++);
-			tmp2 = __insn_dblalign(tmp2, tmp3, srci);
-			ST8(dst8++, tmp2);
-_8B1:
-			tmp1 = LD8(src8++);
-			tmp3 = __insn_dblalign(tmp3, tmp0, srci);
-			ST8(dst8++, tmp3);
-			m -= 4;
-		} while (m);
-
-_8B0:
-		tmp0 = __insn_dblalign(tmp0, tmp1, srci);
-		ST8(dst8++, tmp0);
-		src8--;
-
-_M0:
-		if (__builtin_expect(n >= CHIP_L2_LINE_SIZE(), 0)) {
-			op_t tmp4, tmp5, tmp6, tmp7, tmp8;
-
-			prefetch = ((const char *)src8) +
-				CHIP_L2_LINE_SIZE() * PREFETCH_LINES_AHEAD;
-
-			for (tmp0 = LD8(src8++); n >= CHIP_L2_LINE_SIZE();
-			     n -= CHIP_L2_LINE_SIZE()) {
-				/* Prefetch and advance to next line to
-				   prefetch, but don't go past the end.  */
-				__insn_prefetch(prefetch);
-
-				/* Make sure prefetch got scheduled
-				   earlier.  */
-				__asm__ ("" : : : "memory");
-
-				prefetch += CHIP_L2_LINE_SIZE();
-				prefetch = (prefetch < src1_end) ? prefetch :
-					(const char *) src8;
-
-				tmp1 = LD8(src8++);
-				tmp2 = LD8(src8++);
-				tmp3 = LD8(src8++);
-				tmp4 = LD8(src8++);
-				tmp5 = LD8(src8++);
-				tmp6 = LD8(src8++);
-				tmp7 = LD8(src8++);
-				tmp8 = LD8(src8++);
-
-				tmp0 = __insn_dblalign(tmp0, tmp1, srci);
-				tmp1 = __insn_dblalign(tmp1, tmp2, srci);
-				tmp2 = __insn_dblalign(tmp2, tmp3, srci);
-				tmp3 = __insn_dblalign(tmp3, tmp4, srci);
-				tmp4 = __insn_dblalign(tmp4, tmp5, srci);
-				tmp5 = __insn_dblalign(tmp5, tmp6, srci);
-				tmp6 = __insn_dblalign(tmp6, tmp7, srci);
-				tmp7 = __insn_dblalign(tmp7, tmp8, srci);
-
-				__insn_wh64(dst8);
-
-				ST8(dst8++, tmp0);
-				ST8(dst8++, tmp1);
-				ST8(dst8++, tmp2);
-				ST8(dst8++, tmp3);
-				ST8(dst8++, tmp4);
-				ST8(dst8++, tmp5);
-				ST8(dst8++, tmp6);
-				ST8(dst8++, tmp7);
-
-				tmp0 = tmp8;
-			}
-			src8--;
-		}
-
-		/* Copy the rest 8-byte chunks. */
-		if (n >= sizeof(op_t)) {
-			tmp0 = LD8(src8++);
-			for (; n >= sizeof(op_t); n -= sizeof(op_t)) {
-				tmp1 = LD8(src8++);
-				tmp0 = __insn_dblalign(tmp0, tmp1, srci);
-				ST8(dst8++, tmp0);
-				tmp0 = tmp1;
-			}
-			src8--;
-		}
-
-		if (n == 0)
-			return RETVAL;
-
-		tmp0 = LD8(src8++);
-		tmp1 = ((const char *)src8 <= src1_end)
-			? LD8((op_t *)src8) : 0;
-		final = __insn_dblalign(tmp0, tmp1, srci);
-
-	} else {
-		/* Aligned copy. */
-
-		const op_t *__restrict src8 = (const op_t *)src1;
-
-		/* src8 and dst8 are both word-aligned. */
-		if (n >= CHIP_L2_LINE_SIZE()) {
-			/* Copy until 'dst' is cache-line-aligned. */
-			for (; (uintptr_t)dst8 & (CHIP_L2_LINE_SIZE() - 1);
-			     n -= sizeof(op_t))
-				ST8(dst8++, LD8(src8++));
-
-			for (; n >= CHIP_L2_LINE_SIZE(); ) {
-				op_t tmp0, tmp1, tmp2, tmp3;
-				op_t tmp4, tmp5, tmp6, tmp7;
-
-				/*
-				 * Prefetch and advance to next line
-				 * to prefetch, but don't go past the
-				 * end.
-				 */
-				__insn_prefetch(prefetch);
-
-				/* Make sure prefetch got scheduled
-				   earlier.  */
-				__asm__ ("" : : : "memory");
-
-				prefetch += CHIP_L2_LINE_SIZE();
-				prefetch = (prefetch < src1_end) ? prefetch :
-					(const char *)src8;
-
-				/*
-				 * Do all the loads before wh64.  This
-				 * is necessary if [src8, src8+7] and
-				 * [dst8, dst8+7] share the same cache
-				 * line and dst8 <= src8, as can be
-				 * the case when called from memmove,
-				 * or with code tested on x86 whose
-				 * memcpy always works with forward
-				 * copies.
-				 */
-				tmp0 = LD8(src8++);
-				tmp1 = LD8(src8++);
-				tmp2 = LD8(src8++);
-				tmp3 = LD8(src8++);
-				tmp4 = LD8(src8++);
-				tmp5 = LD8(src8++);
-				tmp6 = LD8(src8++);
-				tmp7 = LD8(src8++);
-
-				/* wh64 and wait for tmp7 load completion. */
-				__asm__ ("move %0, %0; wh64 %1\n"
-					 : : "r"(tmp7), "r"(dst8));
-
-				ST8(dst8++, tmp0);
-				ST8(dst8++, tmp1);
-				ST8(dst8++, tmp2);
-				ST8(dst8++, tmp3);
-				ST8(dst8++, tmp4);
-				ST8(dst8++, tmp5);
-				ST8(dst8++, tmp6);
-				ST8(dst8++, tmp7);
-
-				n -= CHIP_L2_LINE_SIZE();
-			}
-#if CHIP_L2_LINE_SIZE() != 64
-# error "Fix code that assumes particular L2 cache line size."
-#endif
-		}
-
-		for (; n >= sizeof(op_t); n -= sizeof(op_t))
-			ST8(dst8++, LD8(src8++));
-
-		if (__builtin_expect(n == 0, 1))
-			return RETVAL;
-
-		final = LD8(src8);
-	}
-
-	/* n != 0 if we get here.  Write out any trailing bytes. */
-	dst1 = (char *)dst8;
-#ifndef __BIG_ENDIAN__
-	if (n & 4) {
-		ST4((uint32_t *)dst1, final);
-		dst1 += 4;
-		final >>= 32;
-		n &= 3;
-	}
-	if (n & 2) {
-		ST2((uint16_t *)dst1, final);
-		dst1 += 2;
-		final >>= 16;
-		n &= 1;
-	}
-	if (n)
-		ST1((uint8_t *)dst1, final);
-#else
-	if (n & 4) {
-		ST4((uint32_t *)dst1, final >> 32);
-		dst1 += 4;
-        }
-        else
-        {
-		final >>= 32;
-        }
-	if (n & 2) {
-		ST2((uint16_t *)dst1, final >> 16);
-		dst1 += 2;
-        }
-        else
-        {
-		final >>= 16;
-        }
-	if (n & 1)
-		ST1((uint8_t *)dst1, final >> 8);
-#endif
-
-	return RETVAL;
-}
-
-#ifdef USERCOPY_FUNC
-#undef ST1
-#undef ST2
-#undef ST4
-#undef ST8
-#undef LD1
-#undef LD2
-#undef LD4
-#undef LD8
-#undef USERCOPY_FUNC
-#endif