[deliverable/linux.git] / arch / frv / mm / highmem.c

/* highmem.c: arch-specific highmem stuff
 *
 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */
#include <linux/highmem.h>
#include <linux/module.h>

void *kmap(struct page *page)
{
	might_sleep();
	if (!PageHighMem(page))
		return page_address(page);
	return kmap_high(page);
}

EXPORT_SYMBOL(kmap);

void kunmap(struct page *page)
{
	if (in_interrupt())
		BUG();
	if (!PageHighMem(page))
		return;
	kunmap_high(page);
}

EXPORT_SYMBOL(kunmap);

struct page *kmap_atomic_to_page(void *ptr)
{
	return virt_to_page(ptr);
}
Commit	Line	Data
1da177e4 LT	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>
40234401	12	#include <linux/module.h>
1da177e4 LT	13
	14	void kmap(struct page page)
	15	{
	16	might_sleep();
	17	if (!PageHighMem(page))
	18	return page_address(page);
	19	return kmap_high(page);
	20	}
	21
40234401 DH	22	EXPORT_SYMBOL(kmap);
40234401 DH	23
1da177e4 LT	24	void kunmap(struct page *page)
	25	{
	26	if (in_interrupt())
	27	BUG();
	28	if (!PageHighMem(page))
	29	return;
	30	kunmap_high(page);
	31	}
	32
40234401 DH	33	EXPORT_SYMBOL(kunmap);
40234401 DH	34
1da177e4 LT	35	struct page kmap_atomic_to_page(void ptr)
	36	{
	37	return virt_to_page(ptr);
	38	}