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authorJon Tollefson <kniht@linux.vnet.ibm.com>2008-07-23 21:27:52 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-24 10:47:19 -0700
commit53ba51d21d6e048424ab8aadfebdb1f25ae07b60 (patch)
tree0d5c5ee420e85f3a86ff7fe9151e7c3d547e7de1
parente11bfbfcb08ef4223b863799897c19cdf7c5bc00 (diff)
hugetlb: allow arch overridden hugepage allocation
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>
-rw-r--r--include/linux/hugetlb.h10
-rw-r--r--mm/hugetlb.c11
2 files changed, 13 insertions, 8 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index b2c17f62cac..9a71d4cc88c 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -39,6 +39,7 @@ void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed);
extern unsigned long hugepages_treat_as_movable;
extern const unsigned long hugetlb_zero, hugetlb_infinity;
extern int sysctl_hugetlb_shm_group;
+extern struct list_head huge_boot_pages;
/* arch callbacks */
@@ -188,6 +189,14 @@ struct hstate {
char name[HSTATE_NAME_LEN];
};
+struct huge_bootmem_page {
+ struct list_head list;
+ struct hstate *hstate;
+};
+
+/* arch callback */
+int __init alloc_bootmem_huge_page(struct hstate *h);
+
void __init hugetlb_add_hstate(unsigned order);
struct hstate *size_to_hstate(unsigned long size);
@@ -256,6 +265,7 @@ static inline struct hstate *page_hstate(struct page *page)
#else
struct hstate {};
+#define alloc_bootmem_huge_page(h) NULL
#define hstate_file(f) NULL
#define hstate_vma(v) NULL
#define hstate_inode(i) NULL
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 2a2f6e86940..3e1506b808a 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -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);