mm: clean up zone flags
authorJohannes Weiner <hannes@cmpxchg.org>
Thu, 9 Oct 2014 22:28:17 +0000 (15:28 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 10 Oct 2014 02:25:57 +0000 (22:25 -0400)
commit5705465174686d007473e017b76c4b64b44aa690
tree09d197b925802f7b2b7d96129046eb0d15da60dc
parent7c809968ffa92d41baaa9054e897436480179b20
mm: clean up zone flags

Page reclaim tests zone_is_reclaim_dirty(), but the site that actually
sets this state does zone_set_flag(zone, ZONE_TAIL_LRU_DIRTY), sending the
reader through layers indirection just to track down a simple bit.

Remove all zone flag wrappers and just use bitops against zone->flags
directly.  It's just as readable and the lines are barely any longer.

Also rename ZONE_TAIL_LRU_DIRTY to ZONE_DIRTY to match ZONE_WRITEBACK, and
remove the zone_flags_t typedef.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/linux/mmzone.h
mm/backing-dev.c
mm/oom_kill.c
mm/page_alloc.c
mm/vmscan.c