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| author | Andrea Arcangeli <aarcange@redhat.com> | 2011-01-14 00:46:40 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-14 02:32:40 +0100 |
| commit | 5f6e8da70a289d403975907371ce5738c726ad3f (patch) | |
| tree | c44705a17d4133a8d4a8d02dae9bb5487c3bc2a6 /include/asm-generic | |
| parent | thp: CONFIG_TRANSPARENT_HUGEPAGE (diff) | |
| download | linux-5f6e8da70a289d403975907371ce5738c726ad3f.tar.xz linux-5f6e8da70a289d403975907371ce5738c726ad3f.zip | |
thp: special pmd_trans_* functions
These returns 0 at compile time when the config option is disabled, to
allow gcc to eliminate the transparent hugepage function calls at compile
time without additional #ifdefs (only the export of those functions have
to be visible to gcc but they won't be required at link time and
huge_memory.o can be not built at all).
_PAGE_BIT_UNUSED1 is never used for pmd, only on pte.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/pgtable.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h index 6f3c6ae4fe03..0ab2cd27c60f 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -348,6 +348,17 @@ extern void untrack_pfn_vma(struct vm_area_struct *vma, unsigned long pfn, unsigned long size); #endif +#ifndef CONFIG_TRANSPARENT_HUGEPAGE +static inline int pmd_trans_huge(pmd_t pmd) +{ + return 0; +} +static inline int pmd_trans_splitting(pmd_t pmd) +{ + return 0; +} +#endif + #endif /* !__ASSEMBLY__ */ #endif /* _ASM_GENERIC_PGTABLE_H */ |