1 files changed, 15 insertions, 6 deletions

diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index c60e519e2917..14fb6d67e6a3 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -116,6 +116,7 @@ static struct inode *mqueue_get_inode(struct super_block *sb,
 
         inode = new_inode(sb);
         if (inode) {
+                inode->i_ino = get_next_ino();
                 inode->i_mode = mode;
                 inode->i_uid = current_fsuid();
                 inode->i_gid = current_fsgid();
@@ -210,13 +211,13 @@ out:
         return error;
 }
 
-static int mqueue_get_sb(struct file_system_type *fs_type,
+static struct dentry *mqueue_mount(struct file_system_type *fs_type,
                          int flags, const char *dev_name,
-                         void *data, struct vfsmount *mnt)
+                         void *data)
 {
         if (!(flags & MS_KERNMOUNT))
                 data = current->nsproxy->ipc_ns;
-        return get_sb_ns(fs_type, flags, data, mqueue_fill_super, mnt);
+        return mount_ns(fs_type, flags, data, mqueue_fill_super);
 }
 
 static void init_once(void *foo)
@@ -236,11 +237,18 @@ static struct inode *mqueue_alloc_inode(struct super_block *sb)
         return &ei->vfs_inode;
 }
 
-static void mqueue_destroy_inode(struct inode *inode)
+static void mqueue_i_callback(struct rcu_head *head)
 {
+        struct inode *inode = container_of(head, struct inode, i_rcu);
+        INIT_LIST_HEAD(&inode->i_dentry);
         kmem_cache_free(mqueue_inode_cachep, MQUEUE_I(inode));
 }
 
+static void mqueue_destroy_inode(struct inode *inode)
+{
+        call_rcu(&inode->i_rcu, mqueue_i_callback);
+}
+
 static void mqueue_evict_inode(struct inode *inode)
 {
         struct mqueue_inode_info *info;
@@ -769,7 +777,7 @@ SYSCALL_DEFINE1(mq_unlink, const char __user *, u_name)
 
         inode = dentry->d_inode;
         if (inode)
-                atomic_inc(&inode->i_count);
+                ihold(inode);
         err = mnt_want_write(ipc_ns->mq_mnt);
         if (err)
                 goto out_err;
@@ -1219,6 +1227,7 @@ static const struct file_operations mqueue_file_operations = {
         .flush = mqueue_flush_file,
         .poll = mqueue_poll_file,
         .read = mqueue_read_file,
+        .llseek = default_llseek,
 };
 
 static const struct super_operations mqueue_super_ops = {
@@ -1230,7 +1239,7 @@ static const struct super_operations mqueue_super_ops = {
 
 static struct file_system_type mqueue_fs_type = {
         .name = "mqueue",
-        .get_sb = mqueue_get_sb,
+        .mount = mqueue_mount,
         .kill_sb = kill_litter_super,
 };