The patch titled
Subject: mm: remove __ARCH_HAS_4LEVEL_HACK and include/asm-generic/4level-fixup.h
has been added to the -mm tree. Its filename is
mm-remove-__arch_has_4level_hack-and-include-asm-generic-4level-fixuph.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-remove-__arch_has_4level_hack-and-include-asm-generic-4level-fixuph.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-remove-__arch_has_4level_hack-and-include-asm-generic-4level-fixuph.patch
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Subject: mm: remove __ARCH_HAS_4LEVEL_HACK and include/asm-generic/4level-fixup.h
There are no architectures that use include/asm-generic/4level-fixup.h
therefore it can be removed along with __ARCH_HAS_4LEVEL_HACK define.
Link: http://lkml.kernel.org/r/1572938135-31886-14-git-send-email-rppt@xxxxxxxxxx
Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Cc: Anatoly Pugachev <matorola@xxxxxxxxx>
Cc: Anton Ivanov <anton.ivanov@xxxxxxxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Greentime Hu <green.hu@xxxxxxxxx>
Cc: Greg Ungerer <gerg@xxxxxxxxxxxxxx>
Cc: Helge Deller <deller@xxxxxx>
Cc: "James E.J. Bottomley" <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
Cc: Jeff Dike <jdike@xxxxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>
Cc: Mark Salter <msalter@xxxxxxxxxx>
Cc: Matt Turner <mattst88@xxxxxxxxx>
Cc: Michal Simek <monstr@xxxxxxxxx>
Cc: Peter Rosin <peda@xxxxxxxxxx>
Cc: Richard Weinberger <richard@xxxxxx>
Cc: Rolf Eike Beer <eike-kernel@xxxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: Russell King <rmk+kernel@xxxxxxxxxxxxxxx>
Cc: Sam Creasey <sammy@xxxxxxxxx>
Cc: Vincent Chen <deanbo422@xxxxxxxxx>
Cc: Vineet Gupta <Vineet.Gupta1@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/asm-generic/4level-fixup.h | 39 ---------------------------
include/linux/mm.h | 10 +++---
mm/memory.c | 8 -----
3 files changed, 5 insertions(+), 52 deletions(-)
--- a/include/asm-generic/4level-fixup.h
+++ /dev/null
@@ -1,39 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _4LEVEL_FIXUP_H
-#define _4LEVEL_FIXUP_H
-
-#define __ARCH_HAS_4LEVEL_HACK
-#define __PAGETABLE_PUD_FOLDED 1
-
-#define PUD_SHIFT PGDIR_SHIFT
-#define PUD_SIZE PGDIR_SIZE
-#define PUD_MASK PGDIR_MASK
-#define PTRS_PER_PUD 1
-
-#define pud_t pgd_t
-
-#define pmd_alloc(mm, pud, address) \
- ((unlikely(pgd_none(*(pud))) && __pmd_alloc(mm, pud, address))? \
- NULL: pmd_offset(pud, address))
-
-#define pud_offset(pgd, start) (pgd)
-#define pud_none(pud) 0
-#define pud_bad(pud) 0
-#define pud_present(pud) 1
-#define pud_ERROR(pud) do { } while (0)
-#define pud_clear(pud) pgd_clear(pud)
-#define pud_val(pud) pgd_val(pud)
-#define pud_populate(mm, pud, pmd) pgd_populate(mm, pud, pmd)
-#define pud_page(pud) pgd_page(pud)
-#define pud_page_vaddr(pud) pgd_page_vaddr(pud)
-
-#undef pud_free_tlb
-#define pud_free_tlb(tlb, x, addr) do { } while (0)
-#define pud_free(mm, x) do { } while (0)
-
-#undef pud_addr_end
-#define pud_addr_end(addr, end) (end)
-
-#include <asm-generic/5level-fixup.h>
-
-#endif
--- a/include/linux/mm.h~mm-remove-__arch_has_4level_hack-and-include-asm-generic-4level-fixuph
+++ a/include/linux/mm.h
@@ -1853,12 +1853,12 @@ static inline void mm_dec_nr_ptes(struct
int __pte_alloc(struct mm_struct *mm, pmd_t *pmd);
int __pte_alloc_kernel(pmd_t *pmd);
+#if defined(CONFIG_MMU)
+
/*
- * The following ifdef needed to get the 4level-fixup.h header to work.
- * Remove it when 4level-fixup.h has been removed.
+ * The following ifdef needed to get the 5level-fixup.h header to work.
+ * Remove it when 5level-fixup.h has been removed.
*/
-#if defined(CONFIG_MMU) && !defined(__ARCH_HAS_4LEVEL_HACK)
-
#ifndef __ARCH_HAS_5LEVEL_HACK
static inline p4d_t *p4d_alloc(struct mm_struct *mm, pgd_t *pgd,
unsigned long address)
@@ -1880,7 +1880,7 @@ static inline pmd_t *pmd_alloc(struct mm
return (unlikely(pud_none(*pud)) && __pmd_alloc(mm, pud, address))?
NULL: pmd_offset(pud, address);
}
-#endif /* CONFIG_MMU && !__ARCH_HAS_4LEVEL_HACK */
+#endif /* CONFIG_MMU */
#if USE_SPLIT_PTE_PTLOCKS
#if ALLOC_SPLIT_PTLOCKS
--- a/mm/memory.c~mm-remove-__arch_has_4level_hack-and-include-asm-generic-4level-fixuph
+++ a/mm/memory.c
@@ -4191,19 +4191,11 @@ int __pmd_alloc(struct mm_struct *mm, pu
smp_wmb(); /* See comment in __pte_alloc */
ptl = pud_lock(mm, pud);
-#ifndef __ARCH_HAS_4LEVEL_HACK
if (!pud_present(*pud)) {
mm_inc_nr_pmds(mm);
pud_populate(mm, pud, new);
} else /* Another has populated it */
pmd_free(mm, new);
-#else
- if (!pgd_present(*pud)) {
- mm_inc_nr_pmds(mm);
- pgd_populate(mm, pud, new);
- } else /* Another has populated it */
- pmd_free(mm, new);
-#endif /* __ARCH_HAS_4LEVEL_HACK */
spin_unlock(ptl);
return 0;
}
_
Patches currently in -mm which might be from rppt@xxxxxxxxxxxxx are
userfaultfd-require-cap_sys_ptrace-for-uffd_feature_event_fork.patch
alpha-use-pgtable-nopud-instead-of-4level-fixup.patch
arm-nommu-use-pgtable-nopud-instead-of-4level-fixup.patch
c6x-use-pgtable-nopud-instead-of-4level-fixup.patch
m68k-nommu-use-pgtable-nopud-instead-of-4level-fixup.patch
m68k-mm-use-pgtable-nopxd-instead-of-4level-fixup.patch
microblaze-use-pgtable-nopmd-instead-of-4level-fixup.patch
nds32-use-pgtable-nopmd-instead-of-4level-fixup.patch
parisc-use-pgtable-nopxd-instead-of-4level-fixup.patch
sparc32-use-pgtable-nopud-instead-of-4level-fixup.patch
um-remove-unused-pxx_offset_proc-and-addr_pte-functions.patch
um-add-support-for-folded-p4d-page-tables.patch
mm-remove-__arch_has_4level_hack-and-include-asm-generic-4level-fixuph.patch
