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hugetlb: allow arch overridden hugepage allocation

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Allow alloc_bootmem_huge_page() to be overridden by architectures that
can't always use bootmem.  This requires huge_boot_pages to be available
for use by this function.

This is required for powerpc 16G pages, which have to be reserved prior to
boot-time.  The location of these pages are indicated in the device tree.

Acked-by: Adam Litke <agl@us.ibm.com>
Signed-off-by: Jon Tollefson <kniht@linux.vnet.ibm.com>
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:
Jon Tollefson
2008-07-23 21:27:52 -07:00
committed by Linus Torvalds
parent e11bfbfcb0
commit 53ba51d21d
2 changed files with 13 additions and 8 deletions
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11
mm/hugetlb.c
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@@ -31,6 +31,8 @@ static int max_hstate;
unsigned int default_hstate_idx;
struct hstate hstates[HUGE_MAX_HSTATE];
__initdata LIST_HEAD(huge_boot_pages);
/* for command line parsing */
static struct hstate * __initdata parsed_hstate;
static unsigned long __initdata default_hstate_max_huge_pages;
@@ -925,14 +927,7 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma,
return page;
}
static __initdata LIST_HEAD(huge_boot_pages);
struct huge_bootmem_page {
struct list_head list;
struct hstate *hstate;
};
static int __init alloc_bootmem_huge_page(struct hstate *h)
__attribute__((weak)) int alloc_bootmem_huge_page(struct hstate *h)
{
struct huge_bootmem_page *m;
int nr_nodes = nodes_weight(node_online_map);