[PATCH] mm/compaction: Remove some useless code in compact_zone()

[yanfei . xu]

From: Yanfei Xu <yanfei.xu@xxxxxxxxxxxxx>

start_pfn has been declared at the begin of compact_zone(), it's
no need to declare it again. And remove an useless semicolon.

Signed-off-by: Yanfei Xu <yanfei.xu@xxxxxxxxxxxxx>
---
 mm/compaction.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/compaction.c b/mm/compaction.c
index 176dcded298e..5e69c1f94d96 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -2272,7 +2272,7 @@ compact_zone(struct compact_control *cc, struct capture_control *capc)
 
 	while ((ret = compact_finished(cc)) == COMPACT_CONTINUE) {
 		int err;
-		unsigned long start_pfn = cc->migrate_pfn;
+		start_pfn = cc->migrate_pfn;
 
 		/*
 		 * Avoid multiple rescans which can happen if a page cannot be
@@ -2309,7 +2309,6 @@ compact_zone(struct compact_control *cc, struct capture_control *capc)
 		case ISOLATE_SUCCESS:
 			update_cached = false;
 			last_migrated_pfn = start_pfn;
-			;
 		}
 
 		err = migrate_pages(&cc->migratepages, compaction_alloc,
-- 
2.18.2