Btrfs: avoid unnecessarily locking inode when clearing a range
If the range being cleared was not marked for defrag and we are not about to clear the range from the defrag status, we don't need to lock and unlock the inode. Signed-off-by: NFilipe Manana <fdmanana@suse.com> Reviewed-by: NChris Mason <clm@fb.com> Reviewed-by: NWang Shilong <wangshilong1991@gmail.com> Signed-off-by: NChris Mason <clm@fb.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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