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   - unicore32 and hexagon both have very outdated gcc releases, but the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, 348 deletions

diff --git a/arch/tile/mm/hugetlbpage.c b/arch/tile/mm/hugetlbpage.c
deleted file mode 100644
index 0986d426a413..000000000000
--- a/arch/tile/mm/hugetlbpage.c
+++ /dev/null
@@ -1,348 +0,0 @@
-/*
- * Copyright 2010 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.
- *
- * TILE Huge TLB Page Support for Kernel.
- * Taken from i386 hugetlb implementation:
- * Copyright (C) 2002, Rohit Seth <rohit.seth@intel.com>
- */
-
-#include <linux/init.h>
-#include <linux/fs.h>
-#include <linux/mm.h>
-#include <linux/sched/mm.h>
-#include <linux/hugetlb.h>
-#include <linux/pagemap.h>
-#include <linux/slab.h>
-#include <linux/err.h>
-#include <linux/sysctl.h>
-#include <linux/mman.h>
-#include <asm/tlb.h>
-#include <asm/tlbflush.h>
-#include <asm/setup.h>
-
-#ifdef CONFIG_HUGETLB_SUPER_PAGES
-
-/*
- * Provide an additional huge page size (in addition to the regular default
- * huge page size) if no "hugepagesz" arguments are specified.
- * Note that it must be smaller than the default huge page size so
- * that it's possible to allocate them on demand from the buddy allocator.
- * You can change this to 64K (on a 16K build), 256K, 1M, or 4M,
- * or not define it at all.
- */
-#define ADDITIONAL_HUGE_SIZE (1024 * 1024UL)
-
-/* "Extra" page-size multipliers, one per level of the page table. */
-int huge_shift[HUGE_SHIFT_ENTRIES] = {
-#ifdef ADDITIONAL_HUGE_SIZE
-#define ADDITIONAL_HUGE_SHIFT __builtin_ctzl(ADDITIONAL_HUGE_SIZE / PAGE_SIZE)
-	[HUGE_SHIFT_PAGE] = ADDITIONAL_HUGE_SHIFT
-#endif
-};
-
-#endif
-
-pte_t *huge_pte_alloc(struct mm_struct *mm,
-		      unsigned long addr, unsigned long sz)
-{
-	pgd_t *pgd;
-	pud_t *pud;
-
-	addr &= -sz;   /* Mask off any low bits in the address. */
-
-	pgd = pgd_offset(mm, addr);
-	pud = pud_alloc(mm, pgd, addr);
-
-#ifdef CONFIG_HUGETLB_SUPER_PAGES
-	if (sz >= PGDIR_SIZE) {
-		BUG_ON(sz != PGDIR_SIZE &&
-		       sz != PGDIR_SIZE << huge_shift[HUGE_SHIFT_PGDIR]);
-		return (pte_t *)pud;
-	} else {
-		pmd_t *pmd = pmd_alloc(mm, pud, addr);
-		if (sz >= PMD_SIZE) {
-			BUG_ON(sz != PMD_SIZE &&
-			       sz != (PMD_SIZE << huge_shift[HUGE_SHIFT_PMD]));
-			return (pte_t *)pmd;
-		}
-		else {
-			if (sz != PAGE_SIZE << huge_shift[HUGE_SHIFT_PAGE])
-				panic("Unexpected page size %#lx\n", sz);
-			return pte_alloc_map(mm, pmd, addr);
-		}
-	}
-#else
-	BUG_ON(sz != PMD_SIZE);
-	return (pte_t *) pmd_alloc(mm, pud, addr);
-#endif
-}
-
-static pte_t *get_pte(pte_t *base, int index, int level)
-{
-	pte_t *ptep = base + index;
-#ifdef CONFIG_HUGETLB_SUPER_PAGES
-	if (!pte_present(*ptep) && huge_shift[level] != 0) {
-		unsigned long mask = -1UL << huge_shift[level];
-		pte_t *super_ptep = base + (index & mask);
-		pte_t pte = *super_ptep;
-		if (pte_present(pte) && pte_super(pte))
-			ptep = super_ptep;
-	}
-#endif
-	return ptep;
-}
-
-pte_t *huge_pte_offset(struct mm_struct *mm,
-		       unsigned long addr, unsigned long sz)
-{
-	pgd_t *pgd;
-	pud_t *pud;
-	pmd_t *pmd;
-#ifdef CONFIG_HUGETLB_SUPER_PAGES
-	pte_t *pte;
-#endif
-
-	/* Get the top-level page table entry. */
-	pgd = (pgd_t *)get_pte((pte_t *)mm->pgd, pgd_index(addr), 0);
-
-	/* We don't have four levels. */
-	pud = pud_offset(pgd, addr);
-#ifndef __PAGETABLE_PUD_FOLDED
-# error support fourth page table level
-#endif
-	if (!pud_present(*pud))
-		return NULL;
-
-	/* Check for an L0 huge PTE, if we have three levels. */
-#ifndef __PAGETABLE_PMD_FOLDED
-	if (pud_huge(*pud))
-		return (pte_t *)pud;
-
-	pmd = (pmd_t *)get_pte((pte_t *)pud_page_vaddr(*pud),
-			       pmd_index(addr), 1);
-	if (!pmd_present(*pmd))
-		return NULL;
-#else
-	pmd = pmd_offset(pud, addr);
-#endif
-
-	/* Check for an L1 huge PTE. */
-	if (pmd_huge(*pmd))
-		return (pte_t *)pmd;
-
-#ifdef CONFIG_HUGETLB_SUPER_PAGES
-	/* Check for an L2 huge PTE. */
-	pte = get_pte((pte_t *)pmd_page_vaddr(*pmd), pte_index(addr), 2);
-	if (!pte_present(*pte))
-		return NULL;
-	if (pte_super(*pte))
-		return pte;
-#endif
-
-	return NULL;
-}
-
-int pmd_huge(pmd_t pmd)
-{
-	return !!(pmd_val(pmd) & _PAGE_HUGE_PAGE);
-}
-
-int pud_huge(pud_t pud)
-{
-	return !!(pud_val(pud) & _PAGE_HUGE_PAGE);
-}
-
-#ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
-static unsigned long hugetlb_get_unmapped_area_bottomup(struct file *file,
-		unsigned long addr, unsigned long len,
-		unsigned long pgoff, unsigned long flags)
-{
-	struct hstate *h = hstate_file(file);
-	struct vm_unmapped_area_info info;
-
-	info.flags = 0;
-	info.length = len;
-	info.low_limit = TASK_UNMAPPED_BASE;
-	info.high_limit = TASK_SIZE;
-	info.align_mask = PAGE_MASK & ~huge_page_mask(h);
-	info.align_offset = 0;
-	return vm_unmapped_area(&info);
-}
-
-static unsigned long hugetlb_get_unmapped_area_topdown(struct file *file,
-		unsigned long addr0, unsigned long len,
-		unsigned long pgoff, unsigned long flags)
-{
-	struct hstate *h = hstate_file(file);
-	struct vm_unmapped_area_info info;
-	unsigned long addr;
-
-	info.flags = VM_UNMAPPED_AREA_TOPDOWN;
-	info.length = len;
-	info.low_limit = PAGE_SIZE;
-	info.high_limit = current->mm->mmap_base;
-	info.align_mask = PAGE_MASK & ~huge_page_mask(h);
-	info.align_offset = 0;
-	addr = vm_unmapped_area(&info);
-
-	/*
-	 * A failed mmap() very likely causes application failure,
-	 * so fall back to the bottom-up function here. This scenario
-	 * can happen with large stack limits and large mmap()
-	 * allocations.
-	 */
-	if (addr & ~PAGE_MASK) {
-		VM_BUG_ON(addr != -ENOMEM);
-		info.flags = 0;
-		info.low_limit = TASK_UNMAPPED_BASE;
-		info.high_limit = TASK_SIZE;
-		addr = vm_unmapped_area(&info);
-	}
-
-	return addr;
-}
-
-unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
-		unsigned long len, unsigned long pgoff, unsigned long flags)
-{
-	struct hstate *h = hstate_file(file);
-	struct mm_struct *mm = current->mm;
-	struct vm_area_struct *vma;
-
-	if (len & ~huge_page_mask(h))
-		return -EINVAL;
-	if (len > TASK_SIZE)
-		return -ENOMEM;
-
-	if (flags & MAP_FIXED) {
-		if (prepare_hugepage_range(file, addr, len))
-			return -EINVAL;
-		return addr;
-	}
-
-	if (addr) {
-		addr = ALIGN(addr, huge_page_size(h));
-		vma = find_vma(mm, addr);
-		if (TASK_SIZE - len >= addr &&
-		    (!vma || addr + len <= vm_start_gap(vma)))
-			return addr;
-	}
-	if (current->mm->get_unmapped_area == arch_get_unmapped_area)
-		return hugetlb_get_unmapped_area_bottomup(file, addr, len,
-				pgoff, flags);
-	else
-		return hugetlb_get_unmapped_area_topdown(file, addr, len,
-				pgoff, flags);
-}
-#endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */
-
-#ifdef CONFIG_HUGETLB_SUPER_PAGES
-static __init int __setup_hugepagesz(unsigned long ps)
-{
-	int log_ps = __builtin_ctzl(ps);
-	int level, base_shift;
-
-	if ((1UL << log_ps) != ps || (log_ps & 1) != 0) {
-		pr_warn("Not enabling %ld byte huge pages; must be a power of four\n",
-			ps);
-		return -EINVAL;
-	}
-
-	if (ps > 64*1024*1024*1024UL) {
-		pr_warn("Not enabling %ld MB huge pages; largest legal value is 64 GB\n",
-			ps >> 20);
-		return -EINVAL;
-	} else if (ps >= PUD_SIZE) {
-		static long hv_jpage_size;
-		if (hv_jpage_size == 0)
-			hv_jpage_size = hv_sysconf(HV_SYSCONF_PAGE_SIZE_JUMBO);
-		if (hv_jpage_size != PUD_SIZE) {
-			pr_warn("Not enabling >= %ld MB huge pages: hypervisor reports size %ld\n",
-				PUD_SIZE >> 20, hv_jpage_size);
-			return -EINVAL;
-		}
-		level = 0;
-		base_shift = PUD_SHIFT;
-	} else if (ps >= PMD_SIZE) {
-		level = 1;
-		base_shift = PMD_SHIFT;
-	} else if (ps > PAGE_SIZE) {
-		level = 2;
-		base_shift = PAGE_SHIFT;
-	} else {
-		pr_err("hugepagesz: huge page size %ld too small\n", ps);
-		return -EINVAL;
-	}
-
-	if (log_ps != base_shift) {
-		int shift_val = log_ps - base_shift;
-		if (huge_shift[level] != 0) {
-			int old_shift = base_shift + huge_shift[level];
-			pr_warn("Not enabling %ld MB huge pages; already have size %ld MB\n",
-				ps >> 20, (1UL << old_shift) >> 20);
-			return -EINVAL;
-		}
-		if (hv_set_pte_super_shift(level, shift_val) != 0) {
-			pr_warn("Not enabling %ld MB huge pages; no hypervisor support\n",
-				ps >> 20);
-			return -EINVAL;
-		}
-		printk(KERN_DEBUG "Enabled %ld MB huge pages\n", ps >> 20);
-		huge_shift[level] = shift_val;
-	}
-
-	hugetlb_add_hstate(log_ps - PAGE_SHIFT);
-
-	return 0;
-}
-
-static bool saw_hugepagesz;
-
-static __init int setup_hugepagesz(char *opt)
-{
-	int rc;
-
-	if (!saw_hugepagesz) {
-		saw_hugepagesz = true;
-		memset(huge_shift, 0, sizeof(huge_shift));
-	}
-	rc = __setup_hugepagesz(memparse(opt, NULL));
-	if (rc)
-		hugetlb_bad_size();
-	return rc;
-}
-__setup("hugepagesz=", setup_hugepagesz);
-
-#ifdef ADDITIONAL_HUGE_SIZE
-/*
- * Provide an additional huge page size if no "hugepagesz" args are given.
- * In that case, all the cores have properly set up their hv super_shift
- * already, but we need to notify the hugetlb code to enable the
- * new huge page size from the Linux point of view.
- */
-static __init int add_default_hugepagesz(void)
-{
-	if (!saw_hugepagesz) {
-		BUILD_BUG_ON(ADDITIONAL_HUGE_SIZE >= PMD_SIZE ||
-			     ADDITIONAL_HUGE_SIZE <= PAGE_SIZE);
-		BUILD_BUG_ON((PAGE_SIZE << ADDITIONAL_HUGE_SHIFT) !=
-			     ADDITIONAL_HUGE_SIZE);
-		BUILD_BUG_ON(ADDITIONAL_HUGE_SHIFT & 1);
-		hugetlb_add_hstate(ADDITIONAL_HUGE_SHIFT);
-	}
-	return 0;
-}
-arch_initcall(add_default_hugepagesz);
-#endif
-
-#endif /* CONFIG_HUGETLB_SUPER_PAGES */