42 	unsigned long sz;  in size_inside_page()  local
44 	sz = PAGE_SIZE - (start & (PAGE_SIZE - 1));  in size_inside_page()
46 	return min(sz, size);  in size_inside_page()
102 	ssize_t read, sz;  in read_mem()  local
114 		sz = size_inside_page(p, count);  in read_mem()
115 		if (sz > 0) {  in read_mem()
116 			if (clear_user(buf, sz))  in read_mem()
118 			buf += sz;  in read_mem()
119 			p += sz;  in read_mem()
120 			count -= sz;  in read_mem()
121 			read += sz;  in read_mem()
129 		sz = size_inside_page(p, count);  in read_mem()
143 		remaining = copy_to_user(buf, ptr, sz);  in read_mem()
148 		buf += sz;  in read_mem()
149 		p += sz;  in read_mem()
150 		count -= sz;  in read_mem()
151 		read += sz;  in read_mem()
162 	ssize_t written, sz;  in write_mem()  local
177 		sz = size_inside_page(p, count);  in write_mem()
179 		buf += sz;  in write_mem()
180 		p += sz;  in write_mem()
181 		count -= sz;  in write_mem()
182 		written += sz;  in write_mem()
187 		sz = size_inside_page(p, count);  in write_mem()
189 		if (!range_is_allowed(p >> PAGE_SHIFT, sz))  in write_mem()
204 		copied = copy_from_user(ptr, buf, sz);  in write_mem()
207 			written += sz - copied;  in write_mem()
213 		buf += sz;  in write_mem()
214 		p += sz;  in write_mem()
215 		count -= sz;  in write_mem()
216 		written += sz;  in write_mem()
383 	ssize_t low_count, read, sz;  in read_kmem()  local
396 			sz = size_inside_page(p, low_count);  in read_kmem()
397 			if (clear_user(buf, sz))  in read_kmem()
399 			buf += sz;  in read_kmem()
400 			p += sz;  in read_kmem()
401 			read += sz;  in read_kmem()
402 			low_count -= sz;  in read_kmem()
403 			count -= sz;  in read_kmem()
407 			sz = size_inside_page(p, low_count);  in read_kmem()
416 			if (copy_to_user(buf, kbuf, sz))  in read_kmem()
418 			buf += sz;  in read_kmem()
419 			p += sz;  in read_kmem()
420 			read += sz;  in read_kmem()
421 			low_count -= sz;  in read_kmem()
422 			count -= sz;  in read_kmem()
431 			sz = size_inside_page(p, count);  in read_kmem()
436 			sz = vread(kbuf, (char *)p, sz);  in read_kmem()
437 			if (!sz)  in read_kmem()
439 			if (copy_to_user(buf, kbuf, sz)) {  in read_kmem()
443 			count -= sz;  in read_kmem()
444 			buf += sz;  in read_kmem()
445 			read += sz;  in read_kmem()
446 			p += sz;  in read_kmem()
458 	ssize_t written, sz;  in do_write_kmem()  local
465 		sz = size_inside_page(p, count);  in do_write_kmem()
467 		buf += sz;  in do_write_kmem()
468 		p += sz;  in do_write_kmem()
469 		count -= sz;  in do_write_kmem()
470 		written += sz;  in do_write_kmem()
477 		sz = size_inside_page(p, count);  in do_write_kmem()
486 		copied = copy_from_user(ptr, buf, sz);  in do_write_kmem()
488 			written += sz - copied;  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()
531 			unsigned long sz = size_inside_page(p, count);  in write_kmem()  local
538 			n = copy_from_user(kbuf, buf, sz);  in write_kmem()
543 			vwrite(kbuf, (char *)p, sz);  in write_kmem()
544 			count -= sz;  in write_kmem()
545 			buf += sz;  in write_kmem()
546 			virtr += sz;  in write_kmem()
547 			p += sz;  in write_kmem()