437 	unsigned block_start, block_end;  in walk_page_buffers()  local
442 	for (	bh = head, block_start = 0;  in walk_page_buffers()
443 		ret == 0 && (bh != head || !block_start);  in walk_page_buffers()
444 	    	block_start = block_end, bh = next)  in walk_page_buffers()
447 		block_end = block_start + blocksize;  in walk_page_buffers()
448 		if (block_end <= from || block_start >= to) {  in walk_page_buffers()
765 				 unsigned int block_start)  in ocfs2_should_read_blk()  argument
767 	u64 offset = page_offset(page) + block_start;  in ocfs2_should_read_blk()
791 	unsigned int block_end, block_start;  in ocfs2_map_page_blocks()  local
798 	for (bh = head, block_start = 0; bh != head || !block_start;  in ocfs2_map_page_blocks()
799 	     bh = bh->b_this_page, block_start += bsize) {  in ocfs2_map_page_blocks()
800 		block_end = block_start + bsize;  in ocfs2_map_page_blocks()
808 		if (block_start >= to || block_end <= from) {  in ocfs2_map_page_blocks()
831 			   ocfs2_should_read_blk(inode, page, block_start) &&  in ocfs2_map_page_blocks()
832 			   (block_start < from || block_end > to)) {  in ocfs2_map_page_blocks()
857 	block_start = 0;  in ocfs2_map_page_blocks()
859 		block_end = block_start + bsize;  in ocfs2_map_page_blocks()
862 		if (block_start >= to)  in ocfs2_map_page_blocks()
865 		zero_user(page, block_start, bh->b_size);  in ocfs2_map_page_blocks()
870 		block_start = block_end;  in ocfs2_map_page_blocks()
1010 	unsigned int block_start, block_end;  in ocfs2_zero_new_buffers()  local
1018 	block_start = 0;  in ocfs2_zero_new_buffers()
1020 		block_end = block_start + bh->b_size;  in ocfs2_zero_new_buffers()
1023 			if (block_end > from && block_start < to) {  in ocfs2_zero_new_buffers()
1027 					start = max(from, block_start);  in ocfs2_zero_new_buffers()
1039 		block_start = block_end;  in ocfs2_zero_new_buffers()