LXR linux/arch/frv/mm/highmem.c

   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
  13void *kmap(struct page *page)
  14{
  15        might_sleep();
  16        if (!PageHighMem(page))
  17                return page_address(page);
  18        return kmap_high(page);
  19}
  20
  21void kunmap(struct page *page)
  22{
  23        if (in_interrupt())
  24                BUG();
  25        if (!PageHighMem(page))
  26                return;
  27        kunmap_high(page);
  28}
  29
  30struct page *kmap_atomic_to_page(void *ptr)
  31{
  32        return virt_to_page(ptr);
  33}
  34