tree 81277ea0bf611f37544dbb0a22e4eff3fc2a9aa8
parent 0eb927c0ab789d3d7d69f68acb850f69d4e7c36f
author Vlastimil Babka <vbabka@suse.cz> 1390348267 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1390349988 -0800

mm: compaction: encapsulate defer reset logic

Currently there are several functions to manipulate the deferred
compaction state variables.  The remaining case where the variables are
touched directly is when a successful allocation occurs in direct
compaction, or is expected to be successful in the future by kswapd.
Here, the lowest order that is expected to fail is updated, and in the
case of successful allocation, the deferred status and counter is reset
completely.

Create a new function compaction_defer_reset() to encapsulate this
functionality and make it easier to understand the code.  No functional
change.

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>