linux-kernel - [RFC][PATCH 01/10] zsmalloc: drop unused variable `nr_to

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Message-Id: <1432911928-14654-2-git-send-email-sergey.senozhatsky@gmail.com>
Date:	Sat, 30 May 2015 00:05:19 +0900
From:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Minchan Kim <minchan@...nel.org>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Subject: [RFC][PATCH 01/10] zsmalloc: drop unused variable `nr_to_migrate'

__zs_compact() does not use `nr_to_migrate', drop it.

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
---
 mm/zsmalloc.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 33d5126..e615b31 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -1701,7 +1701,6 @@ static struct page *isolate_source_page(struct size_class *class)
 static unsigned long __zs_compact(struct zs_pool *pool,
 				struct size_class *class)
 {
-	int nr_to_migrate;
 	struct zs_compact_control cc;
 	struct page *src_page;
 	struct page *dst_page = NULL;
@@ -1712,8 +1711,6 @@ static unsigned long __zs_compact(struct zs_pool *pool,
 
 		BUG_ON(!is_first_page(src_page));
 
-		/* The goal is to migrate all live objects in source page */
-		nr_to_migrate = src_page->inuse;
 		cc.index = 0;
 		cc.s_page = src_page;
 
@@ -1728,7 +1725,6 @@ static unsigned long __zs_compact(struct zs_pool *pool,
 
 			putback_zspage(pool, class, dst_page);
 			nr_total_migrated += cc.nr_migrated;
-			nr_to_migrate -= cc.nr_migrated;
 		}
 
 		/* Stop if we couldn't find slot */
-- 
2.4.2.337.gfae46aa

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