From: Heesub Shin <[email protected]>

commit 13fb44e4b0414d7e718433a49e6430d5b76bd46e upstream.

Remove code lines currently not in use or never called.

Signed-off-by: Heesub Shin <[email protected]>
Acked-by: Vlastimil Babka <[email protected]>
Cc: Dongjun Shin <[email protected]>
Cc: Sunghwan Yun <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: Bartlomiej Zolnierkiewicz <[email protected]>
Cc: Michal Nazarewicz <[email protected]>
Cc: Naoya Horiguchi <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Dongjun Shin <[email protected]>
Cc: Sunghwan Yun <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Mel Gorman <[email protected]>
---
 mm/compaction.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/mm/compaction.c b/mm/compaction.c
index 5c17302..c5f2f18 100644
--- 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)
 {
@@ -734,7 +728,6 @@ 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
@@ -1163,9 +1156,6 @@ 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));
-- 
1.8.4.5

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