mm/compaction: clean up unused code lines

Remove code lines currently not in use or never called.

Signed-off-by: Heesub Shin <heesub.shin@samsung.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Dongjun Shin <d.j.shin@samsung.com>
Cc: Sunghwan Yun <sunghwan.yun@samsung.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Dongjun Shin <d.j.shin@samsung.com>
Cc: Sunghwan Yun <sunghwan.yun@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/compaction.c b/mm/compaction.c
index 627dc2e4320fdf976895e9b96c2c54d91b2b2760..95f7531458f760da9d03986de95e105237d899d3 100644 (file)
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -208,12 +208,6 @@ static bool compact_checklock_irqsave(spinlock_t *lock, unsigned long *flags,
        return true;
 }
 
-static inline bool compact_trylock_irqsave(spinlock_t *lock,
-                       unsigned long *flags, struct compact_control *cc)
-{
-       return compact_checklock_irqsave(lock, flags, false, cc);
-}
-
 /* Returns true if the page is within a block suitable for migration to */
 static bool suitable_migration_target(struct page *page)
 {
@@ -736,7 +730,6 @@ static void isolate_freepages(struct zone *zone,
                        continue;
 
                /* Found a block suitable for isolating free pages from */
-               isolated = 0;
 
                /*
                 * Take care when isolating in last pageblock of a zone which
@@ -1165,9 +1158,6 @@ static void __compact_pgdat(pg_data_t *pgdat, struct compact_control *cc)
                        if (zone_watermark_ok(zone, cc->order,
                                                low_wmark_pages(zone), 0, 0))
                                compaction_defer_reset(zone, cc->order, false);
-                       /* Currently async compaction is never deferred. */
-                       else if (cc->sync)
-                               defer_compaction(zone, cc->order);
                }
 
                VM_BUG_ON(!list_empty(&cc->freepages));