btrfs: Factor out common extent locking code in submit_compressed_extents
Irrespective of whether the compress code fell back to uncompressed or a compressed extent has to be submitted, the extent range is always locked. So factor out the common lock_extent call at the beginning of the loop. No functional changes just removes one duplicate lock_extent call. Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de> Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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