diff options
| author | Mel Gorman <mgorman@suse.de> | 2015-02-12 14:58:19 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-12 18:54:08 -0800 |
| commit | e7bb4b6d1609cce391af1e7bc6f31d14f1a3a890 (patch) | |
| tree | a6c5101e1b4cd9c9f0de605723b7c378b0c028d7 /arch/x86/include/asm/pgtable.h | |
| parent | 5d833062139d290adb8b62c093b654a01a353448 (diff) | |
mm: add p[te|md] protnone helpers for use by NUMA balancing
This is a preparatory patch that introduces protnone helpers for automatic
NUMA balancing.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Tested-by: Sasha Levin <sasha.levin@oracle.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: Paul Mackerras <paulus@samba.org>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86/include/asm/pgtable.h')
| -rw-r--r-- | arch/x86/include/asm/pgtable.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 0fe03f834fb..f519b0b529d 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -483,6 +483,22 @@ static inline int pmd_present(pmd_t pmd) _PAGE_NUMA); } +#ifdef CONFIG_NUMA_BALANCING +/* + * These work without NUMA balancing but the kernel does not care. See the + * comment in include/asm-generic/pgtable.h + */ +static inline int pte_protnone(pte_t pte) +{ + return pte_flags(pte) & _PAGE_PROTNONE; +} + +static inline int pmd_protnone(pmd_t pmd) +{ + return pmd_flags(pmd) & _PAGE_PROTNONE; +} +#endif /* CONFIG_NUMA_BALANCING */ + static inline int pmd_none(pmd_t pmd) { /* Only check low word on 32-bit platforms, since it might be |