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authorBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>2012-10-10 15:53:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-11 08:50:14 +0900
commit627260595ca6abcb16d68a3732bac6b547e112d6 (patch)
treee129ac3500e1636f6b1e2ffaf3cd1443557af32c /include/linux/pageblock-flags.h
parent1633dbbacbaa3a2f95ef901caf9d0b32728c10b6 (diff)
downloadop-kernel-dev-627260595ca6abcb16d68a3732bac6b547e112d6.zip
op-kernel-dev-627260595ca6abcb16d68a3732bac6b547e112d6.tar.gz
mm: compaction: fix bit ranges in {get,clear,set}_pageblock_skip()
{get,clear,set}_pageblock_skip() use incorrect bit ranges (please compare to bit ranges used by {get,set}_pageblock_flags() used for migration types) and can overwrite pageblock migratetype of the next pageblock in the bitmap. Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Mel Gorman <mgorman@suse.de> Tested-by: Thierry Reding <thierry.reding@avionic-design.de> Acked-by: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/pageblock-flags.h')
-rw-r--r--include/linux/pageblock-flags.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/include/linux/pageblock-flags.h b/include/linux/pageblock-flags.h
index eed27f4..be655e4 100644
--- a/include/linux/pageblock-flags.h
+++ b/include/linux/pageblock-flags.h
@@ -71,13 +71,13 @@ void set_pageblock_flags_group(struct page *page, unsigned long flags,
#ifdef CONFIG_COMPACTION
#define get_pageblock_skip(page) \
get_pageblock_flags_group(page, PB_migrate_skip, \
- PB_migrate_skip + 1)
+ PB_migrate_skip)
#define clear_pageblock_skip(page) \
set_pageblock_flags_group(page, 0, PB_migrate_skip, \
- PB_migrate_skip + 1)
+ PB_migrate_skip)
#define set_pageblock_skip(page) \
set_pageblock_flags_group(page, 1, PB_migrate_skip, \
- PB_migrate_skip + 1)
+ PB_migrate_skip)
#endif /* CONFIG_COMPACTION */
#define get_pageblock_flags(page) \
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