forked from luck/tmp_suning_uos_patched
01ad1c0827
hugetlb will need to get compound pages from bootmem to handle the case of them being greater than or equal to MAX_ORDER. Export the constructor function needed for this. Acked-by: Adam Litke <agl@us.ibm.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
124 lines
3.1 KiB
C
124 lines
3.1 KiB
C
/* 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
|