mm: compaction: make compact_control order signed
authorDan Carpenter <dan.carpenter@oracle.com>
Wed, 21 Mar 2012 23:33:54 +0000 (16:33 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 22 Mar 2012 00:54:56 +0000 (17:54 -0700)
commitaad6ec3777bf4930d4f7293745cc4c17a2d87947
tree9a2d141e3361e621d5d6f624d4f1b1e075dc9e7d
parent8575ec29f61da83a2bf382c8c490499dc022101e
mm: compaction: make compact_control order signed

"order" is -1 when compacting via /proc/sys/vm/compact_memory.  Making
it unsigned causes a bug in __compact_pgdat() when we test:

if (cc->order < 0 || !compaction_deferred(zone, cc->order))
compact_zone(zone, cc);

[akpm@linux-foundation.org: make __compact_pgdat()'s comparison match other code sites]
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Minchan Kim <minchan@kernel.org>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/compaction.c