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()
104 	ssize_t read, sz;  in read_mem()  local
113 		sz = size_inside_page(p, count);  in read_mem()
114 		if (sz > 0) {  in read_mem()
115 			if (clear_user(buf, sz))  in read_mem()
117 			buf += sz;  in read_mem()
118 			p += sz;  in read_mem()
119 			count -= sz;  in read_mem()
120 			read += sz;  in read_mem()
128 		sz = size_inside_page(p, count);  in read_mem()
142 		remaining = copy_to_user(buf, ptr, sz);  in read_mem()
147 		buf += sz;  in read_mem()
148 		p += sz;  in read_mem()
149 		count -= sz;  in read_mem()
150 		read += sz;  in read_mem()
161 	ssize_t written, sz;  in write_mem()  local
173 		sz = size_inside_page(p, count);  in write_mem()
175 		buf += sz;  in write_mem()
176 		p += sz;  in write_mem()
177 		count -= sz;  in write_mem()
178 		written += sz;  in write_mem()
183 		sz = size_inside_page(p, count);  in write_mem()
185 		if (!range_is_allowed(p >> PAGE_SHIFT, sz))  in write_mem()
200 		copied = copy_from_user(ptr, buf, sz);  in write_mem()
203 			written += sz - copied;  in write_mem()
209 		buf += sz;  in write_mem()
210 		p += sz;  in write_mem()
211 		count -= sz;  in write_mem()
212 		written += sz;  in write_mem()
409 	ssize_t low_count, read, sz;  in read_kmem()  local
422 			sz = size_inside_page(p, low_count);  in read_kmem()
423 			if (clear_user(buf, sz))  in read_kmem()
425 			buf += sz;  in read_kmem()
426 			p += sz;  in read_kmem()
427 			read += sz;  in read_kmem()
428 			low_count -= sz;  in read_kmem()
429 			count -= sz;  in read_kmem()
433 			sz = size_inside_page(p, low_count);  in read_kmem()
442 			if (copy_to_user(buf, kbuf, sz))  in read_kmem()
444 			buf += sz;  in read_kmem()
445 			p += sz;  in read_kmem()
446 			read += sz;  in read_kmem()
447 			low_count -= sz;  in read_kmem()
448 			count -= sz;  in read_kmem()
457 			sz = size_inside_page(p, count);  in read_kmem()
462 			sz = vread(kbuf, (char *)p, sz);  in read_kmem()
463 			if (!sz)  in read_kmem()
465 			if (copy_to_user(buf, kbuf, sz)) {  in read_kmem()
469 			count -= sz;  in read_kmem()
470 			buf += sz;  in read_kmem()
471 			read += sz;  in read_kmem()
472 			p += sz;  in read_kmem()
484 	ssize_t written, sz;  in do_write_kmem()  local
491 		sz = size_inside_page(p, count);  in do_write_kmem()
493 		buf += sz;  in do_write_kmem()
494 		p += sz;  in do_write_kmem()
495 		count -= sz;  in do_write_kmem()
496 		written += sz;  in do_write_kmem()
503 		sz = size_inside_page(p, count);  in do_write_kmem()
512 		copied = copy_from_user(ptr, buf, sz);  in do_write_kmem()
514 			written += sz - copied;  in do_write_kmem()
519 		buf += sz;  in do_write_kmem()
520 		p += sz;  in do_write_kmem()
521 		count -= sz;  in do_write_kmem()
522 		written += sz;  in do_write_kmem()
557 			unsigned long sz = size_inside_page(p, count);  in write_kmem()  local
564 			n = copy_from_user(kbuf, buf, sz);  in write_kmem()
569 			vwrite(kbuf, (char *)p, sz);  in write_kmem()
570 			count -= sz;  in write_kmem()
571 			buf += sz;  in write_kmem()
572 			virtr += sz;  in write_kmem()
573 			p += sz;  in write_kmem()