Btrfs: move duplicated nodatasum check into common reflink/dedupe helper
Move the check that verifies if both inodes have checksums disabled or both have them enabled, from the clone and deduplication functions into the new common helper btrfs_remap_file_range_prep(). Signed-off-by: NFilipe Manana <fdmanana@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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