diff options
| author |   Andrea Arcangeli <aarcange@redhat.com> | 2011-01-13 15:47:09 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-13 17:32:45 -0800 |
| commit | 4b7167b9ff9b7f3f528cbc4c7d02ebd275b9b10c (patch) | |
| tree | ad2c23c28b9dea009daf3719aefeb79103e2c152 /arch | |
| parent | thp: avoid breaking huge pmd invariants in case of vma_adjust failures (diff) | |
| download | linux-dev-4b7167b9ff9b7f3f528cbc4c7d02ebd275b9b10c.tar.xz linux-dev-4b7167b9ff9b7f3f528cbc4c7d02ebd275b9b10c.zip | |
thp: don't allow transparent hugepage support without PSE
Archs implementing Transparent Hugepage Support must implement a function
called has_transparent_hugepage to be sure the virtual or physical CPU
supports Transparent Hugepages.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.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 | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index c48ba055f693..18601c86fab1 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -160,6 +160,11 @@ static inline int pmd_trans_huge(pmd_t pmd) { return pmd_val(pmd) & _PAGE_PSE; } + +static inline int has_transparent_hugepage(void) +{ + return cpu_has_pse; +} #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ static inline pte_t pte_set_flags(pte_t pte, pteval_t set) |