diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2016-01-26 13:08:10 -0500 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-06-13 09:29:17 -0400 |
| commit | 5eb668f8442ed4e442dd0ecfa8331b6b448b340c (patch) | |
| tree | 4c8ad2336460f0283e5a46719534da89fb612c17 /fs | |
| parent | 6013c31fb7e18019058d8e51f6a01625b98446c4 (diff) | |
gfs2: avoid uninitialized variable warning
[ Upstream commit 67893f12e5374bbcaaffbc6e570acbc2714ea884 ]
We get a bogus warning about a potential uninitialized variable
use in gfs2, because the compiler does not figure out that we
never use the leaf number if get_leaf_nr() returns an error:
fs/gfs2/dir.c: In function 'get_first_leaf':
fs/gfs2/dir.c:802:9: warning: 'leaf_no' may be used uninitialized in this function [-Wmaybe-uninitialized]
fs/gfs2/dir.c: In function 'dir_split_leaf':
fs/gfs2/dir.c:1021:8: warning: 'leaf_no' may be used uninitialized in this function [-Wmaybe-uninitialized]
Changing the 'if (!error)' to 'if (!IS_ERR_VALUE(error))' is
sufficient to let gcc understand that this is exactly the same
condition as in IS_ERR() so it can optimize the code path enough
to understand it.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/gfs2/dir.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c index 487527b42d94..e4aab588d822 100644 --- a/fs/gfs2/dir.c +++ b/fs/gfs2/dir.c @@ -755,7 +755,7 @@ static int get_first_leaf(struct gfs2_inode *dip, u32 index, int error; error = get_leaf_nr(dip, index, &leaf_no); - if (!error) + if (!IS_ERR_VALUE(error)) error = get_leaf(dip, leaf_no, bh_out); return error; @@ -971,7 +971,7 @@ static int dir_split_leaf(struct inode *inode, const struct qstr *name) index = name->hash >> (32 - dip->i_depth); error = get_leaf_nr(dip, index, &leaf_no); - if (error) + if (IS_ERR_VALUE(error)) return error; /* Get the old leaf block */ |