mm: use IS_ENABLED(CONFIG_COMPACTION) instead of COMPACTION_BUILD

We don't need custom COMPACTION_BUILD anymore, since we have handy
IS_ENABLED().

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 4 deletions

diff --git a/mm/vmscan.c b/mm/vmscan.c
index b7ed37675644..a1ce17f44be0 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1752,7 +1752,7 @@ out:
 /* Use reclaim/compaction for costly allocs or under memory pressure */
 static bool in_reclaim_compaction(struct scan_control *sc)
 {
-        if (COMPACTION_BUILD && sc->order &&
+        if (IS_ENABLED(CONFIG_COMPACTION) && sc->order &&
                         (sc->order > PAGE_ALLOC_COSTLY_ORDER ||
                          sc->priority < DEF_PRIORITY - 2))
                 return true;
@@ -2005,7 +2005,7 @@ static bool shrink_zones(struct zonelist *zonelist, struct scan_control *sc)
                         if (zone->all_unreclaimable &&
                                         sc->priority != DEF_PRIORITY)
                                 continue;       /* Let kswapd poll it */
-                        if (COMPACTION_BUILD) {
+                        if (IS_ENABLED(CONFIG_COMPACTION)) {
                                 /*
                                  * If we already have plenty of memory free for
                                  * compaction in this zone, don't free any more.
@@ -2421,7 +2421,8 @@ static bool zone_balanced(struct zone *zone, int order,
                                     balance_gap, classzone_idx, 0))
                 return false;
 
-        if (COMPACTION_BUILD && order && !compaction_suitable(zone, order))
+        if (IS_ENABLED(CONFIG_COMPACTION) && order &&
+            !compaction_suitable(zone, order))
                 return false;
 
         return true;
@@ -2684,7 +2685,7 @@ loop_again:
                          * Do not reclaim more than needed for compaction.
                          */
                         testorder = order;
-                        if (COMPACTION_BUILD && order &&
+                        if (IS_ENABLED(CONFIG_COMPACTION) && order &&
                                         compaction_suitable(zone, order) !=
                                                 COMPACT_SKIPPED)
                                 testorder = 0;