44 	unsigned long sz;  in size_inside_page()  local
46 	sz = PAGE_SIZE - (start & (PAGE_SIZE - 1));  in size_inside_page()
48 	return min(sz, size);  in size_inside_page()
115 	ssize_t read, sz;  in read_mem()  local
129 		sz = size_inside_page(p, count);  in read_mem()
130 		if (sz > 0) {  in read_mem()
131 			if (clear_user(buf, sz))  in read_mem()
133 			buf += sz;  in read_mem()
134 			p += sz;  in read_mem()
135 			count -= sz;  in read_mem()
136 			read += sz;  in read_mem()
149 		sz = size_inside_page(p, count);  in read_mem()
159 			remaining = clear_user(buf, sz);  in read_mem()
170 			probe = probe_kernel_read(bounce, ptr, sz);  in read_mem()
175 			remaining = copy_to_user(buf, bounce, sz);  in read_mem()
181 		buf += sz;  in read_mem()
182 		p += sz;  in read_mem()
183 		count -= sz;  in read_mem()
184 		read += sz;  in read_mem()
202 	ssize_t written, sz;  in write_mem()  local
217 		sz = size_inside_page(p, count);  in write_mem()
219 		buf += sz;  in write_mem()
220 		p += sz;  in write_mem()
221 		count -= sz;  in write_mem()
222 		written += sz;  in write_mem()
229 		sz = size_inside_page(p, count);  in write_mem()
249 			copied = copy_from_user(ptr, buf, sz);  in write_mem()
252 				written += sz - copied;  in write_mem()
259 		buf += sz;  in write_mem()
260 		p += sz;  in write_mem()
261 		count -= sz;  in write_mem()
262 		written += sz;  in write_mem()
440 	ssize_t low_count, read, sz;  in read_kmem()  local
453 			sz = size_inside_page(p, low_count);  in read_kmem()
454 			if (clear_user(buf, sz))  in read_kmem()
456 			buf += sz;  in read_kmem()
457 			p += sz;  in read_kmem()
458 			read += sz;  in read_kmem()
459 			low_count -= sz;  in read_kmem()
460 			count -= sz;  in read_kmem()
464 			sz = size_inside_page(p, low_count);  in read_kmem()
475 			if (copy_to_user(buf, kbuf, sz))  in read_kmem()
477 			buf += sz;  in read_kmem()
478 			p += sz;  in read_kmem()
479 			read += sz;  in read_kmem()
480 			low_count -= sz;  in read_kmem()
481 			count -= sz;  in read_kmem()
494 			sz = size_inside_page(p, count);  in read_kmem()
499 			sz = vread(kbuf, (char *)p, sz);  in read_kmem()
500 			if (!sz)  in read_kmem()
502 			if (copy_to_user(buf, kbuf, sz)) {  in read_kmem()
506 			count -= sz;  in read_kmem()
507 			buf += sz;  in read_kmem()
508 			read += sz;  in read_kmem()
509 			p += sz;  in read_kmem()
523 	ssize_t written, sz;  in do_write_kmem()  local
530 		sz = size_inside_page(p, count);  in do_write_kmem()
532 		buf += sz;  in do_write_kmem()
533 		p += sz;  in do_write_kmem()
534 		count -= sz;  in do_write_kmem()
535 		written += sz;  in do_write_kmem()
542 		sz = size_inside_page(p, count);  in do_write_kmem()
553 		copied = copy_from_user(ptr, buf, sz);  in do_write_kmem()
555 			written += sz - copied;  in do_write_kmem()
560 		buf += sz;  in do_write_kmem()
561 		p += sz;  in do_write_kmem()
562 		count -= sz;  in do_write_kmem()
563 		written += sz;  in do_write_kmem()
600 			unsigned long sz = size_inside_page(p, count);  in write_kmem()  local
607 			n = copy_from_user(kbuf, buf, sz);  in write_kmem()
612 			vwrite(kbuf, (char *)p, sz);  in write_kmem()
613 			count -= sz;  in write_kmem()
614 			buf += sz;  in write_kmem()
615 			virtr += sz;  in write_kmem()
616 			p += sz;  in write_kmem()