[mirror_ubuntu-bionic-kernel.git] / mm / internal.h

/* internal.h: mm/ internal definitions
 *
 * 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.
 */

static inline void set_page_refs(struct page *page, int order)
{
#ifdef CONFIG_MMU
	set_page_count(page, 1);
#else
	int i;

	/*
	 * We need to reference all the pages for this order, otherwise if
	 * anyone accesses one of the pages with (get/put) it will be freed.
	 * - eg: access_process_vm()
	 */
	for (i = 0; i < (1 << order); i++)
		set_page_count(page + i, 1);
#endif /* CONFIG_MMU */
}

extern void fastcall __init __free_pages_bootmem(struct page *page,
						unsigned int order);
Commit	Line	Data
1da177e4 LT	1	/* internal.h: mm/ internal definitions
	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
77a8a788 NP	12	static inline void set_page_refs(struct page *page, int order)
	13	{
	14	#ifdef CONFIG_MMU
	15	set_page_count(page, 1);
	16	#else
	17	int i;
	18
	19	/*
	20	* We need to reference all the pages for this order, otherwise if
	21	* anyone accesses one of the pages with (get/put) it will be freed.
	22	* - eg: access_process_vm()
	23	*/
	24	for (i = 0; i < (1 << order); i++)
	25	set_page_count(page + i, 1);
	26	#endif /* CONFIG_MMU */
	27	}
	28
a226f6c8 DH	29	extern void fastcall __init __free_pages_bootmem(struct page *page,
a226f6c8 DH	30	unsigned int order);