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authorWang, Yalin <Yalin.Wang@sonymobile.com>2015-02-11 15:24:51 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-11 17:06:00 -0800
commit56873f43abdcd574b25105867a990f067747b2f4 (patch)
treebe55c69ee61da7b4e10e46c89e62a2ca68adaf81 /mm/huge_memory.c
parent1d148e218a0d0566b1c06f2f45f1436d53b049b2 (diff)
downloadop-kernel-dev-56873f43abdcd574b25105867a990f067747b2f4.zip
op-kernel-dev-56873f43abdcd574b25105867a990f067747b2f4.tar.gz
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.c7
1 files changed, 1 insertions, 6 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 817a875..8897131 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)
{
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