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Subject[PATCH] [9/18] Export prep_compound_page to the hugetlb allocator
Date

hugetlb will need to get compound pages from bootmem to handle
the case of them being larger than MAX_ORDER. Export
the constructor function needed for this.

Signed-off-by: Andi Kleen <ak@suse.de>

---
mm/internal.h | 2 ++
mm/page_alloc.c | 2 +-
2 files changed, 3 insertions(+), 1 deletion(-)

Index: linux/mm/internal.h
===================================================================
--- linux.orig/mm/internal.h
+++ linux/mm/internal.h
@@ -13,6 +13,8 @@

#include <linux/mm.h>

+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: linux/mm/page_alloc.c
===================================================================
--- linux.orig/mm/page_alloc.c
+++ linux/mm/page_alloc.c
@@ -272,7 +272,7 @@ static void free_compound_page(struct pa
__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;

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