ext4: annotate more implicit fall throughs

There is a plan to build the kernel with -Wimplicit-fallthrough and
these places in the code produced warnings (W=1). Fix them up.

This commit remove the following warnings:

  fs/ext4/indirect.c:1182:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
  fs/ext4/indirect.c:1188:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
  fs/ext4/indirect.c:1432:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
  fs/ext4/indirect.c:1440:6: warning: this statement may fall through [-Wimplicit-fallthrough=]

Signed-off-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>

diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index bf7fa15..c2225f0 100644 (file)
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -1183,18 +1183,21 @@ do_indirects:
                        ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 1);
                        i_data[EXT4_IND_BLOCK] = 0;
                }
+               /* fall through */
        case EXT4_IND_BLOCK:
                nr = i_data[EXT4_DIND_BLOCK];
                if (nr) {
                        ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 2);
                        i_data[EXT4_DIND_BLOCK] = 0;
                }
+               /* fall through */
        case EXT4_DIND_BLOCK:
                nr = i_data[EXT4_TIND_BLOCK];
                if (nr) {
                        ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 3);
                        i_data[EXT4_TIND_BLOCK] = 0;
                }
+               /* fall through */
        case EXT4_TIND_BLOCK:
                ;
        }
@@ -1433,6 +1436,7 @@ do_indirects:
                        ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 1);
                        i_data[EXT4_IND_BLOCK] = 0;
                }
+               /* fall through */
        case EXT4_IND_BLOCK:
                if (++n >= n2)
                        return 0;
@@ -1441,6 +1445,7 @@ do_indirects:
                        ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 2);
                        i_data[EXT4_DIND_BLOCK] = 0;
                }
+               /* fall through */
        case EXT4_DIND_BLOCK:
                if (++n >= n2)
                        return 0;
@@ -1449,6 +1454,7 @@ do_indirects:
                        ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 3);
                        i_data[EXT4_TIND_BLOCK] = 0;
                }
+               /* fall through */
        case EXT4_TIND_BLOCK:
                ;
        }