93 	int size, remain, n;  in buffer_op()  local
96 	remain = len;  in buffer_op()
100 		remain = (n < 0 ? remain : 0);  in buffer_op()
105 	remain -= size;  in buffer_op()
106 	if (remain == 0)  in buffer_op()
109 	while (addr < ((addr + remain) & PAGE_MASK)) {  in buffer_op()
112 			remain = (n < 0 ? remain : 0);  in buffer_op()
117 		remain -= PAGE_SIZE;  in buffer_op()
119 	if (remain == 0)  in buffer_op()
122 	n = do_op_one_page(addr, remain, is_write, op, arg);  in buffer_op()
124 		remain = (n < 0 ? remain : 0);  in buffer_op()
130 	return remain;  in buffer_op()