f2fs: clean up the start_bidx_of_node function

This patch also resolves the following warning reported by kbuild test robot.

fs/f2fs/gc.c: In function 'start_bidx_of_node':
fs/f2fs/gc.c:453:21: warning: 'bidx' may be used uninitialized in this function

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

1 files changed, 8 insertions, 14 deletions

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 644aa3808273..eda8230deb0c 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -430,28 +430,22 @@ next_step:
  */
 block_t start_bidx_of_node(unsigned int node_ofs)
 {
-        block_t start_bidx;
-        unsigned int bidx, indirect_blks;
-        int dec;
+        unsigned int indirect_blks = 2 * NIDS_PER_BLOCK + 4;
+        unsigned int bidx;
 
-        indirect_blks = 2 * NIDS_PER_BLOCK + 4;
+        if (node_ofs == 0)
+                return 0;
 
-        start_bidx = 1;
-        if (node_ofs == 0) {
-                start_bidx = 0;
-        } else if (node_ofs <= 2) {
+        if (node_ofs <= 2) {
                 bidx = node_ofs - 1;
         } else if (node_ofs <= indirect_blks) {
-                dec = (node_ofs - 4) / (NIDS_PER_BLOCK + 1);
+                int dec = (node_ofs - 4) / (NIDS_PER_BLOCK + 1);
                 bidx = node_ofs - 2 - dec;
         } else {
-                dec = (node_ofs - indirect_blks - 3) / (NIDS_PER_BLOCK + 1);
+                int dec = (node_ofs - indirect_blks - 3) / (NIDS_PER_BLOCK + 1);
                 bidx = node_ofs - 5 - dec;
         }
-
-        if (start_bidx)
-                start_bidx = bidx * ADDRS_PER_BLOCK + ADDRS_PER_INODE;
-        return start_bidx;
+        return bidx * ADDRS_PER_BLOCK + ADDRS_PER_INODE;
 }
 
 static int check_dnode(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,