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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>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2012-10-10 15:53:55 -07:00 committed by Linus Torvalds
parent 1633dbbacb
commit 627260595c
1 changed files with 3 additions and 3 deletions
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6
include/linux/pageblock-flags.h
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@ -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) \