linux-kernel - [PATCH 2/2] ext4: annotate implicit fall throughs

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Message-Id: <20190114203945.20233-2-malat@debian.org>
Date:   Mon, 14 Jan 2019 21:39:44 +0100
From:   Mathieu Malaterre <malat@...ian.org>
To:     "Theodore Ts'o" <tytso@....edu>
Cc:     Mathieu Malaterre <malat@...ian.org>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] ext4: annotate 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@...ian.org>
---
 fs/ext4/indirect.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index bf7fa1507e81..c2225f0d31b5 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -1183,18 +1183,21 @@ void ext4_ind_truncate(handle_t *handle, struct inode *inode)
 			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 @@ int ext4_ind_remove_space(handle_t *handle, struct inode *inode,
 			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 @@ int ext4_ind_remove_space(handle_t *handle, struct inode *inode,
 			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 @@ int ext4_ind_remove_space(handle_t *handle, struct inode *inode,
 			ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 3);
 			i_data[EXT4_TIND_BLOCK] = 0;
 		}
+		/* fall through */
 	case EXT4_TIND_BLOCK:
 		;
 	}
-- 
2.19.2