Btrfs: The file argument for fsync() is never null
The "file" argument for fsync is never null so we can remove this check. What drew my attention here is that 7ea80859: "drop unused dentry argument to ->fsync" introduced an unconditional dereference at the start of the function and that generated a smatch warning. Signed-off-by: NDan Carpenter <error27@gmail.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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