mm: export prep_compound_page to mm
Andi Kleen [Thu, 24 Jul 2008 04:27:46 +0000 (21:27 -0700)]
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>

mm/internal.h
mm/page_alloc.c

index 858ad01..1f43f74 100644 (file)
@@ -16,6 +16,8 @@
 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);
index e43aae1..eaa8667 100644 (file)
@@ -264,7 +264,7 @@ static void free_compound_page(struct page *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 nr_pages = 1 << order;