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 (file)
--- 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 {