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   - unicore32 and hexagon both have very outdated gcc releases, but the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, 284 deletions

diff --git a/arch/metag/kernel/module.c b/arch/metag/kernel/module.c
deleted file mode 100644
index bb8dfba9a763..000000000000
--- a/arch/metag/kernel/module.c
+++ /dev/null
@@ -1,284 +0,0 @@
-/*  Kernel module help for Meta.
-
-    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.
-*/
-#include <linux/moduleloader.h>
-#include <linux/elf.h>
-#include <linux/vmalloc.h>
-#include <linux/fs.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/sort.h>
-
-#include <asm/unaligned.h>
-
-/* Count how many different relocations (different symbol, different
-   addend) */
-static unsigned int count_relocs(const Elf32_Rela *rela, unsigned int num)
-{
-	unsigned int i, r_info, r_addend, _count_relocs;
-
-	_count_relocs = 0;
-	r_info = 0;
-	r_addend = 0;
-	for (i = 0; i < num; i++)
-		/* Only count relbranch relocs, others don't need stubs */
-		if (ELF32_R_TYPE(rela[i].r_info) == R_METAG_RELBRANCH &&
-		    (r_info != ELF32_R_SYM(rela[i].r_info) ||
-		     r_addend != rela[i].r_addend)) {
-			_count_relocs++;
-			r_info = ELF32_R_SYM(rela[i].r_info);
-			r_addend = rela[i].r_addend;
-		}
-
-	return _count_relocs;
-}
-
-static int relacmp(const void *_x, const void *_y)
-{
-	const Elf32_Rela *x, *y;
-
-	y = (Elf32_Rela *)_x;
-	x = (Elf32_Rela *)_y;
-
-	/* Compare the entire r_info (as opposed to ELF32_R_SYM(r_info) only) to
-	 * make the comparison cheaper/faster. It won't affect the sorting or
-	 * the counting algorithms' performance
-	 */
-	if (x->r_info < y->r_info)
-		return -1;
-	else if (x->r_info > y->r_info)
-		return 1;
-	else if (x->r_addend < y->r_addend)
-		return -1;
-	else if (x->r_addend > y->r_addend)
-		return 1;
-	else
-		return 0;
-}
-
-static void relaswap(void *_x, void *_y, int size)
-{
-	uint32_t *x, *y, tmp;
-	int i;
-
-	y = (uint32_t *)_x;
-	x = (uint32_t *)_y;
-
-	for (i = 0; i < sizeof(Elf32_Rela) / sizeof(uint32_t); i++) {
-		tmp = x[i];
-		x[i] = y[i];
-		y[i] = tmp;
-	}
-}
-
-/* Get the potential trampolines size required of the init and
-   non-init sections */
-static unsigned long get_plt_size(const Elf32_Ehdr *hdr,
-				  const Elf32_Shdr *sechdrs,
-				  const char *secstrings,
-				  int is_init)
-{
-	unsigned long ret = 0;
-	unsigned i;
-
-	/* Everything marked ALLOC (this includes the exported
-	   symbols) */
-	for (i = 1; i < hdr->e_shnum; i++) {
-		/* If it's called *.init*, and we're not init, we're
-		   not interested */
-		if ((strstr(secstrings + sechdrs[i].sh_name, ".init") != NULL)
-		    != is_init)
-			continue;
-
-		/* We don't want to look at debug sections. */
-		if (strstr(secstrings + sechdrs[i].sh_name, ".debug") != NULL)
-			continue;
-
-		if (sechdrs[i].sh_type == SHT_RELA) {
-			pr_debug("Found relocations in section %u\n", i);
-			pr_debug("Ptr: %p.  Number: %u\n",
-				 (void *)hdr + sechdrs[i].sh_offset,
-				 sechdrs[i].sh_size / sizeof(Elf32_Rela));
-
-			/* Sort the relocation information based on a symbol and
-			 * addend key. This is a stable O(n*log n) complexity
-			 * alogrithm but it will reduce the complexity of
-			 * count_relocs() to linear complexity O(n)
-			 */
-			sort((void *)hdr + sechdrs[i].sh_offset,
-			     sechdrs[i].sh_size / sizeof(Elf32_Rela),
-			     sizeof(Elf32_Rela), relacmp, relaswap);
-
-			ret += count_relocs((void *)hdr
-					     + sechdrs[i].sh_offset,
-					     sechdrs[i].sh_size
-					     / sizeof(Elf32_Rela))
-				* sizeof(struct metag_plt_entry);
-		}
-	}
-
-	return ret;
-}
-
-int module_frob_arch_sections(Elf32_Ehdr *hdr,
-			      Elf32_Shdr *sechdrs,
-			      char *secstrings,
-			      struct module *me)
-{
-	unsigned int i;
-
-	/* Find .plt and .init.plt sections */
-	for (i = 0; i < hdr->e_shnum; i++) {
-		if (strcmp(secstrings + sechdrs[i].sh_name, ".init.plt") == 0)
-			me->arch.init_plt_section = i;
-		else if (strcmp(secstrings + sechdrs[i].sh_name, ".plt") == 0)
-			me->arch.core_plt_section = i;
-	}
-	if (!me->arch.core_plt_section || !me->arch.init_plt_section) {
-		pr_err("Module doesn't contain .plt or .init.plt sections.\n");
-		return -ENOEXEC;
-	}
-
-	/* Override their sizes */
-	sechdrs[me->arch.core_plt_section].sh_size
-		= get_plt_size(hdr, sechdrs, secstrings, 0);
-	sechdrs[me->arch.core_plt_section].sh_type = SHT_NOBITS;
-	sechdrs[me->arch.init_plt_section].sh_size
-		= get_plt_size(hdr, sechdrs, secstrings, 1);
-	sechdrs[me->arch.init_plt_section].sh_type = SHT_NOBITS;
-	return 0;
-}
-
-/* Set up a trampoline in the PLT to bounce us to the distant function */
-static uint32_t do_plt_call(void *location, Elf32_Addr val,
-			    Elf32_Shdr *sechdrs, struct module *mod)
-{
-	struct metag_plt_entry *entry;
-	/* Instructions used to do the indirect jump.  */
-	uint32_t tramp[2];
-
-	/* We have to trash a register, so we assume that any control
-	   transfer more than 21-bits away must be a function call
-	   (so we can use a call-clobbered register).  */
-
-	/* MOVT D0Re0,#HI(v) */
-	tramp[0] = 0x02000005 | (((val & 0xffff0000) >> 16) << 3);
-	/* JUMP D0Re0,#LO(v) */
-	tramp[1] = 0xac000001 | ((val & 0x0000ffff) << 3);
-
-	/* Init, or core PLT? */
-	if (location >= mod->core_layout.base
-	    && location < mod->core_layout.base + mod->core_layout.size)
-		entry = (void *)sechdrs[mod->arch.core_plt_section].sh_addr;
-	else
-		entry = (void *)sechdrs[mod->arch.init_plt_section].sh_addr;
-
-	/* Find this entry, or if that fails, the next avail. entry */
-	while (entry->tramp[0])
-		if (entry->tramp[0] == tramp[0] && entry->tramp[1] == tramp[1])
-			return (uint32_t)entry;
-		else
-			entry++;
-
-	entry->tramp[0] = tramp[0];
-	entry->tramp[1] = tramp[1];
-
-	return (uint32_t)entry;
-}
-
-int apply_relocate_add(Elf32_Shdr *sechdrs,
-		   const char *strtab,
-		   unsigned int symindex,
-		   unsigned int relsec,
-		   struct module *me)
-{
-	unsigned int i;
-	Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr;
-	Elf32_Sym *sym;
-	Elf32_Addr relocation;
-	uint32_t *location;
-	int32_t value;
-
-	pr_debug("Applying relocate section %u to %u\n", relsec,
-		 sechdrs[relsec].sh_info);
-	for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
-		/* This is where to make the change */
-		location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
-			+ rel[i].r_offset;
-		/* This is the symbol it is referring to.  Note that all
-		   undefined symbols have been resolved.  */
-		sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
-			+ ELF32_R_SYM(rel[i].r_info);
-		relocation = sym->st_value + rel[i].r_addend;
-
-		switch (ELF32_R_TYPE(rel[i].r_info)) {
-		case R_METAG_NONE:
-			break;
-		case R_METAG_HIADDR16:
-			relocation >>= 16;
-		case R_METAG_LOADDR16:
-			*location = (*location & 0xfff80007) |
-				((relocation & 0xffff) << 3);
-			break;
-		case R_METAG_ADDR32:
-			/*
-			 * Packed data structures may cause a misaligned
-			 * R_METAG_ADDR32 to be emitted.
-			 */
-			put_unaligned(relocation, location);
-			break;
-		case R_METAG_GETSETOFF:
-			*location += ((relocation & 0xfff) << 7);
-			break;
-		case R_METAG_RELBRANCH:
-			if (*location & (0x7ffff << 5)) {
-				pr_err("bad relbranch relocation\n");
-				break;
-			}
-
-			/* This jump is too big for the offset slot. Build
-			 * a PLT to jump through to get to where we want to go.
-			 * NB: 21bit check - not scaled to 19bit yet
-			 */
-			if (((int32_t)(relocation -
-				       (uint32_t)location) > 0xfffff) ||
-			    ((int32_t)(relocation -
-				       (uint32_t)location) < -0xfffff)) {
-				relocation = do_plt_call(location, relocation,
-							 sechdrs, me);
-			}
-
-			value = relocation - (uint32_t)location;
-
-			/* branch instruction aligned */
-			value /= 4;
-
-			if ((value > 0x7ffff) || (value < -0x7ffff)) {
-				/*
-				 * this should have been caught by the code
-				 * above!
-				 */
-				pr_err("overflow of relbranch reloc\n");
-			}
-
-			*location = (*location & (~(0x7ffff << 5))) |
-				((value & 0x7ffff) << 5);
-			break;
-
-		default:
-			pr_err("module %s: Unknown relocation: %u\n",
-			       me->name, ELF32_R_TYPE(rel[i].r_info));
-			return -ENOEXEC;
-		}
-	}
-	return 0;
-}