linux-kernel - [PATCH RESEND] f2fs: optimize f2fs_write_cache

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Date:	Fri, 17 Jul 2015 12:56:00 +0800 (CST)
From:	"Tiezhu Yang" <kernelpatch@....com>
To:	jaegeuk@...nel.org, cm224.lee@...sung.com, chao2.yu@...sung.com
Cc:	linux-f2fs-devel@...ts.sourceforge.net,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH RESEND] f2fs: optimize f2fs_write_cache_pages

The if statement "goto continue_unlock" is exactly the same when
each if condition is true that is depended on the value of both
"step" and "is_cold_data(page)" are 0 or 1. That means when the
value of "step" equals to "is_cold_data(page)", the if condition
is true and the if statement "goto continue_unlock" appears only
once, so it can be optimized to reduce the duplicated code.

Signed-off-by: Tiezhu Yang <kernelpatch@....com>
---
 fs/f2fs/data.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index b621c08..0219bd0 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1214,9 +1214,7 @@ continue_unlock:
 				goto continue_unlock;
 			}

-			if (step == 0 && !is_cold_data(page))
-				goto continue_unlock;
-			if (step == 1 && is_cold_data(page))
+			if (step == is_cold_data(page))
 				goto continue_unlock;

 			if (PageWriteback(page)) {
-- 
1.8.3.1