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| author | Jiri Kosina <jkosina@suse.cz> | 2010-09-24 14:03:37 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2010-09-24 14:03:37 +0200 |
| commit | 73e6d6c6467771838c1fc6949e6768a12ed72464 (patch) | |
| tree | 94dd60891869a0a275cd332c4e675cf0b101fcfa /include/linux/ksm.h | |
| parent | 12e5272585901217e919da810c801e5084ee0cb1 (diff) | |
| parent | a850ea30374ebed32a0724742601861853fde869 (diff) | |
| download | kernel_replicant_linux-73e6d6c6467771838c1fc6949e6768a12ed72464.tar.gz kernel_replicant_linux-73e6d6c6467771838c1fc6949e6768a12ed72464.tar.bz2 kernel_replicant_linux-73e6d6c6467771838c1fc6949e6768a12ed72464.zip | |
Merge branch 'master' into upstream
Diffstat (limited to 'include/linux/ksm.h')
| -rw-r--r-- | include/linux/ksm.h | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/include/linux/ksm.h b/include/linux/ksm.h index 74d691ee9121..3319a6967626 100644 --- a/include/linux/ksm.h +++ b/include/linux/ksm.h @@ -16,6 +16,9 @@ struct stable_node; struct mem_cgroup; +struct page *ksm_does_need_to_copy(struct page *page, + struct vm_area_struct *vma, unsigned long address); + #ifdef CONFIG_KSM int ksm_madvise(struct vm_area_struct *vma, unsigned long start, unsigned long end, int advice, unsigned long *vm_flags); @@ -70,19 +73,14 @@ static inline void set_page_stable_node(struct page *page, * We'd like to make this conditional on vma->vm_flags & VM_MERGEABLE, * but what if the vma was unmerged while the page was swapped out? */ -struct page *ksm_does_need_to_copy(struct page *page, - struct vm_area_struct *vma, unsigned long address); -static inline struct page *ksm_might_need_to_copy(struct page *page, +static inline int ksm_might_need_to_copy(struct page *page, struct vm_area_struct *vma, unsigned long address) { struct anon_vma *anon_vma = page_anon_vma(page); - if (!anon_vma || - (anon_vma->root == vma->anon_vma->root && - page->index == linear_page_index(vma, address))) - return page; - - return ksm_does_need_to_copy(page, vma, address); + return anon_vma && + (anon_vma->root != vma->anon_vma->root || + page->index != linear_page_index(vma, address)); } int page_referenced_ksm(struct page *page, @@ -115,10 +113,10 @@ static inline int ksm_madvise(struct vm_area_struct *vma, unsigned long start, return 0; } -static inline struct page *ksm_might_need_to_copy(struct page *page, +static inline int ksm_might_need_to_copy(struct page *page, struct vm_area_struct *vma, unsigned long address) { - return page; + return 0; } static inline int page_referenced_ksm(struct page *page, |