1 /* highmem.c: arch-specific highmem stuff
3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
11 #include <linux/highmem.h>
12 #include <linux/module.h>
14 void *kmap(struct page *page)
17 if (!PageHighMem(page))
18 return page_address(page);
19 return kmap_high(page);
24 void kunmap(struct page *page)
28 if (!PageHighMem(page))
33 EXPORT_SYMBOL(kunmap);
35 struct page *kmap_atomic_to_page(void *ptr)
37 return virt_to_page(ptr);
41 EXPORT_SYMBOL(kmap_atomic_to_page);