From: Haicheng Li <haicheng.li@linux.intel.com>
Date: Thu, 13 Jun 2013 08:59:29 +0000 (+0800)
Subject: f2fs: optimize do_write_data_page()
X-Git-Tag: v3.12-rc1~562^2~9
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b25958b6ecf1dce087e62b9aa27cf8f2fe9b5c86;p=kernel%2Fkernel-generic.git

f2fs: optimize do_write_data_page()

Since "need_inplace_update() == true" is a very rare case, using unlikely()
to give compiler a chance to optimize the code.

Signed-off-by: Haicheng Li <haicheng.li@linux.intel.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
---

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 5b145fc..6d4a743 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -497,8 +497,9 @@ int do_write_data_page(struct page *page)
 	 * If current allocation needs SSR,
 	 * it had better in-place writes for updated data.
 	 */
-	if (old_blk_addr != NEW_ADDR && !is_cold_data(page) &&
-				need_inplace_update(inode)) {
+	if (unlikely(old_blk_addr != NEW_ADDR &&
+			!is_cold_data(page) &&
+			need_inplace_update(inode))) {
 		rewrite_data_page(F2FS_SB(inode->i_sb), page,
 						old_blk_addr);
 	} else {