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>

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 6bc5fa8d3dff6fa8f991570de9e747d37e77666a..d85c530a630b3bac994cfaab0b1ecea284cbc04b 100644 (file)
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -687,13 +687,6 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
 /* Trap pasters of __FUNCTION__ at compile-time */
 #define __FUNCTION__ (__func__)
 
-/* This helps us avoid #ifdef CONFIG_COMPACTION */
-#ifdef CONFIG_COMPACTION
-#define COMPACTION_BUILD 1
-#else
-#define COMPACTION_BUILD 0
-#endif
-
 /* Rebuild everything on CONFIG_FTRACE_MCOUNT_RECORD */
 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 # define REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 2b7edfab3b05ea221bfe50289394e4d4f8ad987a..10090c8efd7698a989013922a4c65b88e0d81548 100644 (file)
--- 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;
@@ -2036,7 +2036,7 @@ 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.
@@ -2687,7 +2687,7 @@ 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;
@@ -2833,7 +2833,7 @@ out:
                                continue;
 
                        /* Would compaction fail due to lack of free memory? */
-                       if (COMPACTION_BUILD &&
+                       if (IS_ENABLED(CONFIG_COMPACTION) &&
                            compaction_suitable(zone, order) == COMPACT_SKIPPED)
                                goto loop_again;