Messages in this thread Patch in this message | | | From | Geert Uytterhoeven <> | Subject | [PATCH] btrfs: Refactor count handling in btrfs_unpin_free_ino() | Date | Sat, 15 Jul 2017 13:00:02 +0200 |
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With gcc 4.1.2:
fs/btrfs/inode-map.c: In function ‘btrfs_unpin_free_ino’: fs/btrfs/inode-map.c:254: warning: ‘count’ may be used uninitialized in this function
While this warning is a false-positive, it can easily be killed by refactoring the code.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> --- Please review. Compile-tested only. --- fs/btrfs/inode-map.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-)
diff --git a/fs/btrfs/inode-map.c b/fs/btrfs/inode-map.c index d02019747d001d7b..5d98ac9a2a665bd4 100644 --- a/fs/btrfs/inode-map.c +++ b/fs/btrfs/inode-map.c @@ -257,8 +257,6 @@ void btrfs_unpin_free_ino(struct btrfs_root *root) return; while (1) { - bool add_to_ctl = true; - spin_lock(rbroot_lock); n = rb_first(rbroot); if (!n) { @@ -270,15 +268,14 @@ void btrfs_unpin_free_ino(struct btrfs_root *root) BUG_ON(info->bitmap); /* Logic error */ if (info->offset > root->ino_cache_progress) - add_to_ctl = false; - else if (info->offset + info->bytes > root->ino_cache_progress) - count = root->ino_cache_progress - info->offset + 1; + count = 0; else - count = info->bytes; + count = min(root->ino_cache_progress - info->offset + 1, + info->bytes); rb_erase(&info->offset_index, rbroot); spin_unlock(rbroot_lock); - if (add_to_ctl) + if (count) __btrfs_add_free_space(root->fs_info, ctl, info->offset, count); kmem_cache_free(btrfs_free_space_cachep, info); -- 2.7.4
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