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authorLinus Torvalds <torvalds@linux-foundation.org>2019-05-01 12:19:20 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-05-01 12:19:20 -0700
commit7e74e235bb31a1fefc28d5303da0718b88627ea8 (patch)
treef7aeae2186f8366898d140c9c1d29d39b12c35dc
parent459e3a21535ae3c7a9a123650e54f5c882b8fcbf (diff)
downloadlinux-7e74e235bb31a1fefc28d5303da0718b88627ea8.tar.bz2
gcc-9: don't warn about uninitialized btrfs extent_type variable
The 'extent_type' variable does seem to be reliably initialized, but it's _very_ non-obvious, since there's a "goto next" case that jumps over the normal initialization. That will then always trigger the "start >= extent_end" test, which will end up never falling through to the use of that variable. But the code is certainly not obvious, and the compiler warning looks reasonable. Make 'extent_type' an int, and initialize it to an invalid negative value, which seems to be the common pattern in other places. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/btrfs/inode.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 82fdda8ff5ab..2973608824ec 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -6783,7 +6783,7 @@ struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
u64 extent_start = 0;
u64 extent_end = 0;
u64 objectid = btrfs_ino(inode);
- u8 extent_type;
+ int extent_type = -1;
struct btrfs_path *path = NULL;
struct btrfs_root *root = inode->root;
struct btrfs_file_extent_item *item;