f2fs: stop repeated checking if cp is needed

If it is decided that f2fs should do checkpoint, skip next comparison.

Signed-off-by: Changman Lee <cm224.lee@samsung.com>
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 3efa473..33d1736 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -157,11 +157,11 @@
 
 	if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1)
 		need_cp = true;
-	if (is_inode_flag_set(F2FS_I(inode), FI_NEED_CP))
+	else if (is_inode_flag_set(F2FS_I(inode), FI_NEED_CP))
 		need_cp = true;
-	if (!space_for_roll_forward(sbi))
+	else if (!space_for_roll_forward(sbi))
 		need_cp = true;
-	if (need_to_sync_dir(sbi, inode))
+	else if (need_to_sync_dir(sbi, inode))
 		need_cp = true;
 
 	if (need_cp) {