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mm: export prep_compound_page to mm

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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>
This commit is contained in:
Andi Kleen 2008-07-23 21:27:46 -07:00 • committed by Linus Torvalds
parent b54bbf7b81
commit 01ad1c0827
2 changed files with 3 additions and 1 deletions
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2
mm/internal.h
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@ -16,6 +16,8 @@
void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma, void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma,
unsigned long floor, unsigned long ceiling); 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) static inline void set_page_count(struct page *page, int v)
{ {
atomic_set(&page->_count, v); atomic_set(&page->_count, v);

2
mm/page_alloc.c
View file

@ -264,7 +264,7 @@ static void free_compound_page(struct page *page)
__free_pages_ok(page, compound_order(page)); __free_pages_ok(page, compound_order(page));
} }
static void prep_compound_page(struct page *page, unsigned long order) void prep_compound_page(struct page *page, unsigned long order)
{ {
int i; int i;
int nr_pages = 1 << order; int nr_pages = 1 << order;