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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2013-06-06 04:14:05 +0400 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-06-20 10:55:08 +0400 |
| commit | fde52796d487b675cde55427e3347ff3e59f9a7f (patch) | |
| tree | 3dd0b69084ab6ecc71caa6a110c353597a9df260 /include/linux/huge_mm.h | |
| parent | a6bf2bb03e5bad7e9289d80ecb5faac11630c7ab (diff) | |
| download | linux-fde52796d487b675cde55427e3347ff3e59f9a7f.tar.xz | |
mm/THP: don't use HPAGE_SHIFT in transparent hugepage code
For architectures like powerpc that support multiple explicit hugepage
sizes, HPAGE_SHIFT indicate the default explicit hugepage shift. For THP
to work the hugepage size should be same as PMD_SIZE. So use PMD_SHIFT
directly. So move the define outside CONFIG_TRANSPARENT_HUGEPAGE #ifdef
because we want to use these defines in generic code with if
(pmd_trans_huge()) conditional.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'include/linux/huge_mm.h')
| -rw-r--r-- | include/linux/huge_mm.h | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index 528454c2caa9..cc276d2c3a40 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -58,12 +58,11 @@ extern pmd_t *page_check_address_pmd(struct page *page, #define HPAGE_PMD_ORDER (HPAGE_PMD_SHIFT-PAGE_SHIFT) #define HPAGE_PMD_NR (1<<HPAGE_PMD_ORDER) +#define HPAGE_PMD_SHIFT PMD_SHIFT +#define HPAGE_PMD_SIZE ((1UL) << HPAGE_PMD_SHIFT) +#define HPAGE_PMD_MASK (~(HPAGE_PMD_SIZE - 1)) #ifdef CONFIG_TRANSPARENT_HUGEPAGE -#define HPAGE_PMD_SHIFT HPAGE_SHIFT -#define HPAGE_PMD_MASK HPAGE_MASK -#define HPAGE_PMD_SIZE HPAGE_SIZE - extern bool is_vma_temporary_stack(struct vm_area_struct *vma); #define transparent_hugepage_enabled(__vma) \ @@ -181,9 +180,6 @@ extern int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vm unsigned long addr, pmd_t pmd, pmd_t *pmdp); #else /* CONFIG_TRANSPARENT_HUGEPAGE */ -#define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; }) -#define HPAGE_PMD_MASK ({ BUILD_BUG(); 0; }) -#define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; }) #define hpage_nr_pages(x) 1 |