821 	unsigned block_start, block_end;  in ext4_walk_page_buffers()  local
828 	     block_start = block_end, bh = next) {  in ext4_walk_page_buffers()
830 		block_end = block_start + blocksize;  in ext4_walk_page_buffers()
831 		if (block_end <= from || block_start >= to) {  in ext4_walk_page_buffers()
902 	unsigned block_start, block_end;  in ext4_block_write_begin()  local
922 	    block++, block_start = block_end, bh = bh->b_this_page) {  in ext4_block_write_begin()
923 		block_end = block_start + blocksize;  in ext4_block_write_begin()
924 		if (block_end <= from || block_start >= to) {  in ext4_block_write_begin()
947 				if (block_end > to || block_start < from)  in ext4_block_write_begin()
948 					zero_user_segments(page, to, block_end,  in ext4_block_write_begin()
960 		    (block_start < from || block_end > to)) {  in ext4_block_write_begin()