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-rw-r--r--fs/hugetlbfs/inode.c21
1 files changed, 17 insertions, 4 deletions
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index a93b885..06b7c26 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -507,6 +507,13 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb, uid_t uid,
inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
INIT_LIST_HEAD(&inode->i_mapping->private_list);
info = HUGETLBFS_I(inode);
+ /*
+ * The policy is initialized here even if we are creating a
+ * private inode because initialization simply creates an
+ * an empty rb tree and calls spin_lock_init(), later when we
+ * call mpol_free_shared_policy() it will just return because
+ * the rb tree will still be empty.
+ */
mpol_shared_policy_init(&info->policy, NULL);
switch (mode & S_IFMT) {
default:
@@ -931,13 +938,19 @@ static struct file_system_type hugetlbfs_fs_type = {
static struct vfsmount *hugetlbfs_vfsmount;
-static int can_do_hugetlb_shm(void)
+static int can_do_hugetlb_shm(int creat_flags)
{
- return capable(CAP_IPC_LOCK) || in_group_p(sysctl_hugetlb_shm_group);
+ if (creat_flags != HUGETLB_SHMFS_INODE)
+ return 0;
+ if (capable(CAP_IPC_LOCK))
+ return 1;
+ if (in_group_p(sysctl_hugetlb_shm_group))
+ return 1;
+ return 0;
}
struct file *hugetlb_file_setup(const char *name, size_t size, int acctflag,
- struct user_struct **user)
+ struct user_struct **user, int creat_flags)
{
int error = -ENOMEM;
struct file *file;
@@ -949,7 +962,7 @@ struct file *hugetlb_file_setup(const char *name, size_t size, int acctflag,
if (!hugetlbfs_vfsmount)
return ERR_PTR(-ENOENT);
- if (!can_do_hugetlb_shm()) {
+ if (!can_do_hugetlb_shm(creat_flags)) {
*user = current_user();
if (user_shm_lock(size, *user)) {
WARN_ONCE(1,