441 	char *kbuf; /* k-addr because vread() takes vmlist_lock rwlock */  in read_kmem()  local
471 			kbuf = xlate_dev_kmem_ptr((void *)p);  in read_kmem()
472 			if (!virt_addr_valid(kbuf))  in read_kmem()
475 			if (copy_to_user(buf, kbuf, sz))  in read_kmem()
490 		kbuf = (char *)__get_free_page(GFP_KERNEL);  in read_kmem()
491 		if (!kbuf)  in read_kmem()
499 			sz = vread(kbuf, (char *)p, sz);  in read_kmem()
502 			if (copy_to_user(buf, kbuf, sz)) {  in read_kmem()
513 		free_page((unsigned long)kbuf);  in read_kmem()
581 	char *kbuf; /* k-addr because vwrite() takes vmlist_lock rwlock */  in write_kmem()  local
596 		kbuf = (char *)__get_free_page(GFP_KERNEL);  in write_kmem()
597 		if (!kbuf)  in write_kmem()
607 			n = copy_from_user(kbuf, buf, sz);  in write_kmem()
612 			vwrite(kbuf, (char *)p, sz);  in write_kmem()
620 		free_page((unsigned long)kbuf);  in write_kmem()