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Date:	Thu, 03 Apr 2014 17:57:03 +0900
From:	Heesub Shin <heesub.shin@...sung.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Mel Gorman <mgorman@...e.de>,
	Heesub Shin <heesub.shin@...sung.com>,
	Dongjun Shin <d.j.shin@...sung.com>,
	Sunghwan Yun <sunghwan.yun@...sung.com>
Subject: [PATCH 1/2] mm/compaction: clean up unused code lines

This commit removes code lines currently not in use or never called.

Signed-off-by: Heesub Shin <heesub.shin@...sung.com>
Cc: Dongjun Shin <d.j.shin@...sung.com>
Cc: Sunghwan Yun <sunghwan.yun@...sung.com>
---
 mm/compaction.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/mm/compaction.c b/mm/compaction.c
index 9635083..1ef9144 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)
 {
@@ -728,7 +722,6 @@ static void isolate_freepages(struct zone *zone,
 			continue;
 
 		/* Found a block suitable for isolating free pages from */
-		isolated = 0;
 
 		/*
 		 * As pfn may not start aligned, pfn+pageblock_nr_page
@@ -1160,9 +1153,6 @@ 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));
-- 
1.8.3.2

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