The patch titled
Subject: mm: compaction: fix bit ranges in {get,clear,set}_pageblock_skip()
has been added to the -mm tree. Its filename is
mm-compaction-fix-bit-ranges-in-getclearset_pageblock_skip.patch
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------------------------------------------------------
From: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>
Subject: 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@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
Acked-by: Mel Gorman <mgorman@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/pageblock-flags.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff -puN include/linux/pageblock-flags.h~mm-compaction-fix-bit-ranges-in-getclearset_pageblock_skip include/linux/pageblock-flags.h
--- a/include/linux/pageblock-flags.h~mm-compaction-fix-bit-ranges-in-getclearset_pageblock_skip
+++ a/include/linux/pageblock-flags.h
@@ -71,13 +71,13 @@ void set_pageblock_flags_group(struct pa
#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) \
_
Patches currently in -mm which might be from b.zolnierkie@xxxxxxxxxxx are
origin.patch
mm-compaction-fix-bit-ranges-in-getclearset_pageblock_skip.patch
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