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| author | Wu Fengguang <fengguang.wu@intel.com> | 2009-12-16 12:19:58 +0100 |
|---|---|---|
| committer | Andi Kleen <ak@linux.intel.com> | 2009-12-16 12:19:58 +0100 |
| commit | 8d22ba1b74aa9420b6032d856446564fb21f8090 (patch) | |
| tree | 6c2e2d27e81d784faa0481500f1cecc613ff1167 /mm/internal.h | |
| parent | 95d01fc664b9476e0d18e3d745bb209a42a33588 (diff) | |
| download | linux-stable-8d22ba1b74aa9420b6032d856446564fb21f8090.tar.gz linux-stable-8d22ba1b74aa9420b6032d856446564fb21f8090.tar.bz2 linux-stable-8d22ba1b74aa9420b6032d856446564fb21f8090.zip | |
HWPOISON: detect free buddy pages explicitly
Most free pages in the buddy system have no PG_buddy set.
Introduce is_free_buddy_page() for detecting them reliably.
CC: Nick Piggin <npiggin@suse.de>
CC: Mel Gorman <mel@linux.vnet.ibm.com>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Diffstat (limited to 'mm/internal.h')
| -rw-r--r-- | mm/internal.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/internal.h b/mm/internal.h index 4fe67a162cb4..49b2ff776b78 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -50,6 +50,9 @@ extern void putback_lru_page(struct page *page); */ extern void __free_pages_bootmem(struct page *page, unsigned int order); extern void prep_compound_page(struct page *page, unsigned long order); +#ifdef CONFIG_MEMORY_FAILURE +extern bool is_free_buddy_page(struct page *page); +#endif /* |