From: Jon Tollefson Date: Thu, 24 Jul 2008 04:27:52 +0000 (-0700) Subject: hugetlb: allow arch overridden hugepage allocation X-Git-Tag: v2.6.27-rc1~783 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=53ba51d21d6e048424ab8aadfebdb1f25ae07b60;p=linux-2.6-omap-h63xx.git 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 Signed-off-by: Jon Tollefson Signed-off-by: Nick Piggin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- 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);