You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
62 lines
1.6 KiB
62 lines
1.6 KiB
/* 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.
|
|
*/
|
|
#ifndef __MM_INTERNAL_H
|
|
#define __MM_INTERNAL_H
|
|
|
|
#include <linux/mm.h>
|
|
|
|
static inline void set_page_count(struct page *page, int v)
|
|
{
|
|
atomic_set(&page->_count, v);
|
|
}
|
|
|
|
/*
|
|
* Turn a non-refcounted page (->_count == 0) into refcounted with
|
|
* a count of one.
|
|
*/
|
|
static inline void set_page_refcounted(struct page *page)
|
|
{
|
|
VM_BUG_ON(PageTail(page));
|
|
VM_BUG_ON(atomic_read(&page->_count));
|
|
set_page_count(page, 1);
|
|
}
|
|
|
|
static inline void __put_page(struct page *page)
|
|
{
|
|
atomic_dec(&page->_count);
|
|
}
|
|
|
|
extern void __free_pages_bootmem(struct page *page, unsigned int order);
|
|
|
|
/*
|
|
* function for dealing with page's order in buddy system.
|
|
* zone->lock is already acquired when we use these.
|
|
* So, we don't need atomic page->flags operations here.
|
|
*/
|
|
static inline unsigned long page_order(struct page *page)
|
|
{
|
|
VM_BUG_ON(!PageBuddy(page));
|
|
return page_private(page);
|
|
}
|
|
|
|
/*
|
|
* FLATMEM and DISCONTIGMEM configurations use alloc_bootmem_node,
|
|
* so all functions starting at paging_init should be marked __init
|
|
* in those cases. SPARSEMEM, however, allows for memory hotplug,
|
|
* and alloc_bootmem_node is not used.
|
|
*/
|
|
#ifdef CONFIG_SPARSEMEM
|
|
#define __paginginit __meminit
|
|
#else
|
|
#define __paginginit __init
|
|
#endif
|
|
|
|
#endif
|
|
|