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| author | Wang, Yalin | 2015-02-12 00:24:51 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2015-02-12 02:06:00 +0100 |
| commit | 56873f43abdcd574b25105867a990f067747b2f4 (patch) | |
| tree | be55c69ee61da7b4e10e46c89e62a2ca68adaf81 /mm/huge_memory.c | |
| parent | mm: add VM_BUG_ON_PAGE() to page_mapcount() (diff) | |
| download | kernel-qcow2-linux-56873f43abdcd574b25105867a990f067747b2f4.tar.gz kernel-qcow2-linux-56873f43abdcd574b25105867a990f067747b2f4.tar.xz kernel-qcow2-linux-56873f43abdcd574b25105867a990f067747b2f4.zip | |
mm:add KPF_ZERO_PAGE flag for /proc/kpageflags
Add KPF_ZERO_PAGE flag for zero_page, so that userspace processes can
detect zero_page in /proc/kpageflags, and then do memory analysis more
accurately.
Signed-off-by: Yalin Wang <yalin.wang@sonymobile.com>
Acked-by: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/huge_memory.c')
| -rw-r--r-- | mm/huge_memory.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 817a875f2b8c..889713180980 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -171,12 +171,7 @@ static int start_khugepaged(void) } static atomic_t huge_zero_refcount; -static struct page *huge_zero_page __read_mostly; - -static inline bool is_huge_zero_page(struct page *page) -{ - return ACCESS_ONCE(huge_zero_page) == page; -} +struct page *huge_zero_page __read_mostly; static inline bool is_huge_zero_pmd(pmd_t pmd) { |