[PATCH] hugepage: Make {alloc,free}_huge_page() local

Originally, mm/hugetlb.c just handled the hugepage physical allocation path
and its {alloc,free}_huge_page() functions were used from the arch specific
hugepage code.  These days those functions are only used with mm/hugetlb.c
itself.  Therefore, this patch makes them static and removes their
prototypes from hugetlb.h.  This requires a small rearrangement of code in
mm/hugetlb.c to avoid a forward declaration.

This patch causes no regressions on the libhugetlbfs testsuite (ppc64,
POWER5).

Signed-off-by: David Gibson <dwg@au1.ibm.com>
Cc: William Lee Irwin III <wli@holomorphy.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index cafe73e..5d84c36 100644 (file)
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -21,8 +21,6 @@ int hugetlb_prefault(struct address_space *, struct vm_area_struct *);
 int hugetlb_report_meminfo(char *);
 int hugetlb_report_node_meminfo(int, char *);
 unsigned long hugetlb_total_pages(void);
-struct page *alloc_huge_page(struct vm_area_struct *, unsigned long);
-void free_huge_page(struct page *);
 int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
                        unsigned long address, int write_access);
 
@@ -97,8 +95,6 @@ static inline unsigned long hugetlb_total_pages(void)
 #define is_hugepage_only_range(mm, addr, len)  0
 #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) \
                                                do { } while (0)
-#define alloc_huge_page(vma, addr)             ({ NULL; })
-#define free_huge_page(p)                      ({ (void)(p); BUG(); })
 #define hugetlb_fault(mm, vma, addr, write)    ({ BUG(); 0; })
 
 #define hugetlb_change_protection(vma, address, end, newprot)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 27fad5d..075877b 100644 (file)
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -88,6 +88,17 @@ static struct page *dequeue_huge_page(struct vm_area_struct *vma,
        return page;
 }
 
+static void free_huge_page(struct page *page)
+{
+       BUG_ON(page_count(page));
+
+       INIT_LIST_HEAD(&page->lru);
+
+       spin_lock(&hugetlb_lock);
+       enqueue_huge_page(page);
+       spin_unlock(&hugetlb_lock);
+}
+
 static int alloc_fresh_huge_page(void)
 {
        static int nid = 0;
@@ -107,18 +118,8 @@ static int alloc_fresh_huge_page(void)
        return 0;
 }
 
-void free_huge_page(struct page *page)
-{
-       BUG_ON(page_count(page));
-
-       INIT_LIST_HEAD(&page->lru);
-
-       spin_lock(&hugetlb_lock);
-       enqueue_huge_page(page);
-       spin_unlock(&hugetlb_lock);
-}
-
-struct page *alloc_huge_page(struct vm_area_struct *vma, unsigned long addr)
+static struct page *alloc_huge_page(struct vm_area_struct *vma,
+                                   unsigned long addr)
 {
        struct inode *inode = vma->vm_file->f_dentry->d_inode;
        struct page *page;