diff options
Diffstat (limited to 'arch/frv/mm/highmem.c')
-rw-r--r-- | arch/frv/mm/highmem.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/frv/mm/highmem.c b/arch/frv/mm/highmem.c new file mode 100644 index 000000000000..7dc8fbf3af97 --- /dev/null +++ b/arch/frv/mm/highmem.c | |||
@@ -0,0 +1,33 @@ | |||
1 | /* highmem.c: arch-specific highmem stuff | ||
2 | * | ||
3 | * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. | ||
4 | * Written by David Howells (dhowells@redhat.com) | ||
5 | * | ||
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. | ||
10 | */ | ||
11 | #include <linux/highmem.h> | ||
12 | |||
13 | void *kmap(struct page *page) | ||
14 | { | ||
15 | might_sleep(); | ||
16 | if (!PageHighMem(page)) | ||
17 | return page_address(page); | ||
18 | return kmap_high(page); | ||
19 | } | ||
20 | |||
21 | void kunmap(struct page *page) | ||
22 | { | ||
23 | if (in_interrupt()) | ||
24 | BUG(); | ||
25 | if (!PageHighMem(page)) | ||
26 | return; | ||
27 | kunmap_high(page); | ||
28 | } | ||
29 | |||
30 | struct page *kmap_atomic_to_page(void *ptr) | ||
31 | { | ||
32 | return virt_to_page(ptr); | ||
33 | } | ||