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- Fix CoW regression for transparent hugepages by routing set_pmd_at to

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set_pte_at, which correctly handles PTE_WRITE and will mark the
   resulting table entry as read-only where appropriate.
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fix from Will Deacon:
 "Fix CoW regression for transparent hugepages by routing set_pmd_at to
  set_pte_at, which correctly handles PTE_WRITE and will mark the
  resulting table entry as read-only where appropriate"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: mm: fix pmd_write CoW brokenness
This commit is contained in:
Linus Torvalds 2014-05-29 14:14:43 -07:00
parent f035b3d322 ceb218359d
commit a991639c26
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/include/asm/pgtable.h
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@ -266,7 +266,7 @@ static inline pmd_t pte_pmd(pte_t pte)
#define pmd_page(pmd) pfn_to_page(__phys_to_pfn(pmd_val(pmd) & PHYS_MASK))
#define set_pmd_at(mm, addr, pmdp, pmd) set_pmd(pmdp, pmd)
#define set_pmd_at(mm, addr, pmdp, pmd) set_pte_at(mm, addr, (pte_t *)pmdp, pmd_pte(pmd))
static inline int has_transparent_hugepage(void)
{