1 /* internal.h: mm/ internal definitions
3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
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.
11 #ifndef __MM_INTERNAL_H
12 #define __MM_INTERNAL_H
16 static inline void set_page_count(struct page *page, int v)
18 atomic_set(&page->_count, v);
22 * Turn a non-refcounted page (->_count == 0) into refcounted with
25 static inline void set_page_refcounted(struct page *page)
27 VM_BUG_ON(PageTail(page));
28 VM_BUG_ON(atomic_read(&page->_count));
29 set_page_count(page, 1);
32 static inline void __put_page(struct page *page)
34 atomic_dec(&page->_count);
37 extern void __free_pages_bootmem(struct page *page, unsigned int order);
40 * function for dealing with page's order in buddy system.
41 * zone->lock is already acquired when we use these.
42 * So, we don't need atomic page->flags operations here.
44 static inline unsigned long page_order(struct page *page)
46 VM_BUG_ON(!PageBuddy(page));
47 return page_private(page);
51 * FLATMEM and DISCONTIGMEM configurations use alloc_bootmem_node,
52 * so all functions starting at paging_init should be marked __init
53 * in those cases. SPARSEMEM, however, allows for memory hotplug,
54 * and alloc_bootmem_node is not used.
56 #ifdef CONFIG_SPARSEMEM
57 #define __paginginit __meminit
59 #define __paginginit __init
62 /* Memory initialisation debug and verification */
69 #ifdef CONFIG_DEBUG_MEMORY_INIT
71 extern int mminit_loglevel;
73 #define mminit_dprintk(level, prefix, fmt, arg...) \
75 if (level < mminit_loglevel) { \
76 printk(level <= MMINIT_WARNING ? KERN_WARNING : KERN_DEBUG); \
77 printk(KERN_CONT "mminit::" prefix " " fmt, ##arg); \
81 extern void mminit_verify_pageflags_layout(void);
82 extern void mminit_verify_page_links(struct page *page,
83 enum zone_type zone, unsigned long nid, unsigned long pfn);
87 static inline void mminit_dprintk(enum mminit_level level,
88 const char *prefix, const char *fmt, ...)
92 static inline void mminit_verify_pageflags_layout(void)
96 static inline void mminit_verify_page_links(struct page *page,
97 enum zone_type zone, unsigned long nid, unsigned long pfn)
100 #endif /* CONFIG_DEBUG_MEMORY_INIT */