hugepages: fix use after free bug in "quota" handling

[linux-2.6-block.git] / include / linux / hugetlb.h

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 7adc4923e7acb5c8b6174d21d253bd543c5e3173..cf0181738c9efb01b1f8ce7d1380ee765e9d367d 100644 (file)
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -14,6 +14,15 @@ struct user_struct;
 #include <linux/shm.h>
 #include <asm/tlbflush.h>
 
+struct hugepage_subpool {
+       spinlock_t lock;
+       long count;
+       long max_hpages, used_hpages;
+};
+
+struct hugepage_subpool *hugepage_new_subpool(long nr_blocks);
+void hugepage_put_subpool(struct hugepage_subpool *spool);
+
 int PageHuge(struct page *page);
 
 void reset_vma_resv_huge_pages(struct vm_area_struct *vma);
@@ -129,12 +138,11 @@ enum {
 
 #ifdef CONFIG_HUGETLBFS
 struct hugetlbfs_sb_info {
-       long    max_blocks;   /* blocks allowed */
-       long    free_blocks;  /* blocks free */
        long    max_inodes;   /* inodes allowed */
        long    free_inodes;  /* inodes free */
        spinlock_t      stat_lock;
        struct hstate *hstate;
+       struct hugepage_subpool *spool;
 };
 
 static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
@@ -146,8 +154,6 @@ extern const struct file_operations hugetlbfs_file_operations;
 extern const struct vm_operations_struct hugetlb_vm_ops;
 struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct,
                                struct user_struct **user, int creat_flags);
-int hugetlb_get_quota(struct address_space *mapping, long delta);
-void hugetlb_put_quota(struct address_space *mapping, long delta);
 
 static inline int is_file_hugepages(struct file *file)
 {