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| author |   Mel Gorman <mgorman@suse.de> | 2015-02-12 14:58:38 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-12 18:54:08 -0800 |
| commit | c819f37e7e174d68cd013abf33725b4e07ced023 (patch) | |
| tree | 131bbb70b02b61f0096d38e27a7302e5bc244387 /arch | |
| parent | mm: numa: do not trap faults on the huge zero page (diff) | |
| download | linux-dev-c819f37e7e174d68cd013abf33725b4e07ced023.tar.xz linux-dev-c819f37e7e174d68cd013abf33725b4e07ced023.zip | |
x86: mm: restore original pte_special check
Commit b38af4721f59 ("x86,mm: fix pte_special versus pte_numa") adjusted
the pte_special check to take into account that a special pte had
SPECIAL and neither PRESENT nor PROTNONE. Now that NUMA hinting PTEs
are no longer modifying _PAGE_PRESENT it should be safe to restore the
original pte_special behaviour.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Dave Jones <davej@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kirill Shutemov <kirill.shutemov@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/pgtable.h | 8 |
1 files changed, 1 insertions, 7 deletions
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 34d42a7d5595..67fc3d2b0aab 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -132,13 +132,7 @@ static inline int pte_exec(pte_t pte) static inline int pte_special(pte_t pte) { - /* - * See CONFIG_NUMA_BALANCING pte_numa in include/asm-generic/pgtable.h. - * On x86 we have _PAGE_BIT_NUMA == _PAGE_BIT_GLOBAL+1 == - * __PAGE_BIT_SOFTW1 == _PAGE_BIT_SPECIAL. - */ - return (pte_flags(pte) & _PAGE_SPECIAL) && - (pte_flags(pte) & (_PAGE_PRESENT|_PAGE_PROTNONE)); + return pte_flags(pte) & _PAGE_SPECIAL; } static inline unsigned long pte_pfn(pte_t pte) |