160 	u8 *csum;  in __btrfs_lookup_bio_sums()  local
184 			btrfs_bio->csum = btrfs_bio->csum_allocated;  in __btrfs_lookup_bio_sums()
187 			btrfs_bio->csum = btrfs_bio->csum_inline;  in __btrfs_lookup_bio_sums()
189 		csum = btrfs_bio->csum;  in __btrfs_lookup_bio_sums()
191 		csum = (u8 *)dst;  in __btrfs_lookup_bio_sums()
201 	 * between reading the free space cache and updating the csum tree.  in __btrfs_lookup_bio_sums()
220 					       (u32 *)csum, nblocks);  in __btrfs_lookup_bio_sums()
235 				memset(csum, 0, csum_size);  in __btrfs_lookup_bio_sums()
243 						   "no csum found for inode %llu start %llu",  in __btrfs_lookup_bio_sums()
271 		read_extent_buffer(path->nodes[0], csum,  in __btrfs_lookup_bio_sums()
275 		csum += count * csum_size;  in __btrfs_lookup_bio_sums()
520  * helper function for csum removal, this expects the
521  * key to describe the csum pointed to by the path, and it expects
522  * the csum to overlap the range [bytenr, len]
524  * The csum should not be entirely contained in the range and the
525  * range should not be entirely contained in the csum.
550 		 *   [csum     ]  in truncate_one_csum()
561 		 *                 [csum     ]  in truncate_one_csum()
562 		 * we need to truncate from the beginning of the csum  in truncate_one_csum()
577  * deletes the csum items from the csum tree for a given
630 		/* this csum ends before we start, we're done */  in btrfs_del_csums()
639 			 * Check how many csum items preceding this one in this  in btrfs_del_csums()
673 			 *     [csum                ]  in btrfs_del_csums()
675 			 * Our bytes are in the middle of the csum,  in btrfs_del_csums()
679 			 * csum could change, get removed, extended etc.  in btrfs_del_csums()
681 			 * The trick here is the max size of a csum item leaves  in btrfs_del_csums()
686 			 * a nicely formed csum item that we can neatly  in btrfs_del_csums()
784 		/* we didn't find a csum item, insert one */  in btrfs_csum_file_blocks()
809 	 * enough yet to put our csum in.  Grow it  in btrfs_csum_file_blocks()
863 		goto csum;  in btrfs_csum_file_blocks()
892 csum:  in btrfs_csum_file_blocks()