/* 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> void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma, unsigned long floor, unsigned long ceiling); extern void prep_compound_page(struct page *page, unsigned long order); 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 /* Memory initialisation debug and verification */ enum mminit_level { MMINIT_WARNING, MMINIT_VERIFY, MMINIT_TRACE }; #ifdef CONFIG_DEBUG_MEMORY_INIT extern int mminit_loglevel; #define mminit_dprintk(level, prefix, fmt, arg...) \ do { \ if (level < mminit_loglevel) { \ printk(level <= MMINIT_WARNING ? KERN_WARNING : KERN_DEBUG); \ printk(KERN_CONT "mminit::" prefix " " fmt, ##arg); \ } \ } while (0) extern void mminit_verify_pageflags_layout(void); extern void mminit_verify_page_links(struct page *page, enum zone_type zone, unsigned long nid, unsigned long pfn); extern void mminit_verify_zonelist(void); #else static inline void mminit_dprintk(enum mminit_level level, const char *prefix, const char *fmt, ...) { } static inline void mminit_verify_pageflags_layout(void) { } static inline void mminit_verify_page_links(struct page *page, enum zone_type zone, unsigned long nid, unsigned long pfn) { } static inline void mminit_verify_zonelist(void) { } #endif /* CONFIG_DEBUG_MEMORY_INIT */ /* mminit_validate_memmodel_limits is independent of CONFIG_DEBUG_MEMORY_INIT */ #if defined(CONFIG_SPARSEMEM) extern void mminit_validate_memmodel_limits(unsigned long *start_pfn, unsigned long *end_pfn); #else static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn, unsigned long *end_pfn) { } #endif /* CONFIG_SPARSEMEM */ #endif