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| author | Arnd Bergmann <arnd@arndb.de> | 2019-04-07 19:24:43 +0300 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2019-04-07 19:24:43 +0300 |
| commit | 1e83bc8156028a938845a869a3317c3cab9630ac (patch) | |
| tree | f9718bffca8e30f4751a8892cc445e7922d09fd3 /fs/ext4 | |
| parent | d454a27384f6eb05904a59d1607461b7ad312aa9 (diff) | |
| download | linux-1e83bc8156028a938845a869a3317c3cab9630ac.tar.xz | |
ext4: use BUG() instead of BUG_ON(1)
BUG_ON(1) leads to bogus warnings from clang when
CONFIG_PROFILE_ANNOTATED_BRANCHES is set:
fs/ext4/inode.c:544:4: error: variable 'retval' is used uninitialized whenever 'if' condition is false
[-Werror,-Wsometimes-uninitialized]
BUG_ON(1);
^~~~~~~~~
include/asm-generic/bug.h:61:36: note: expanded from macro 'BUG_ON'
^~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:48:23: note: expanded from macro 'unlikely'
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/ext4/inode.c:591:6: note: uninitialized use occurs here
if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) {
^~~~~~
fs/ext4/inode.c:544:4: note: remove the 'if' if its condition is always true
BUG_ON(1);
^
include/asm-generic/bug.h:61:32: note: expanded from macro 'BUG_ON'
^
fs/ext4/inode.c:502:12: note: initialize the variable 'retval' to silence this warning
Change it to BUG() so clang can see that this code path can never
continue.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/extents_status.c | 4 | ||||
| -rw-r--r-- | fs/ext4/inode.c | 4 |
2 files changed, 4 insertions, 4 deletions
diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c index 2b439afafe13..023a3eb3afa3 100644 --- a/fs/ext4/extents_status.c +++ b/fs/ext4/extents_status.c @@ -711,7 +711,7 @@ static void ext4_es_insert_extent_ind_check(struct inode *inode, * We don't need to check unwritten extent because * indirect-based file doesn't have it. */ - BUG_ON(1); + BUG(); } } else if (retval == 0) { if (ext4_es_is_written(es)) { @@ -780,7 +780,7 @@ static int __es_insert_extent(struct inode *inode, struct extent_status *newes) } p = &(*p)->rb_right; } else { - BUG_ON(1); + BUG(); return -EINVAL; } } diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index b32a57bc5d5d..190f0478582a 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -541,7 +541,7 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode, map->m_len = retval; retval = 0; } else { - BUG_ON(1); + BUG(); } #ifdef ES_AGGRESSIVE_TEST ext4_map_blocks_es_recheck(handle, inode, map, @@ -1876,7 +1876,7 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock, else if (ext4_es_is_unwritten(&es)) map->m_flags |= EXT4_MAP_UNWRITTEN; else - BUG_ON(1); + BUG(); #ifdef ES_AGGRESSIVE_TEST ext4_map_blocks_es_recheck(NULL, inode, map, &orig_map, 0); |