The parameter's origin type is long. On an i386 architecture, it can

[karo-tx-linux.git] / fs / namespace.c

diff --git a/fs/namespace.c b/fs/namespace.c
index cda50fe9250ac3e7eb52d6a56143731505ef732f..22bfe8273c680b441f43a0191c7bd0e805a51ec2 100644 (file)
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2721,6 +2721,25 @@ EXPORT_SYMBOL(put_mnt_ns);
 
 struct vfsmount *kern_mount_data(struct file_system_type *type, void *data)
 {
-       return vfs_kern_mount(type, MS_KERNMOUNT, type->name, data);
+       struct vfsmount *mnt;
+       mnt = vfs_kern_mount(type, MS_KERNMOUNT, type->name, data);
+       if (!IS_ERR(mnt)) {
+               /*
+                * it is a longterm mount, don't release mnt until
+                * we unmount before file sys is unregistered
+               */
+               mnt_make_longterm(mnt);
+       }
+       return mnt;
 }
 EXPORT_SYMBOL_GPL(kern_mount_data);
+
+void kern_unmount(struct vfsmount *mnt)
+{
+       /* release long term mount so mount point can be released */
+       if (!IS_ERR_OR_NULL(mnt)) {
+               mnt_make_shortterm(mnt);
+               mntput(mnt);
+       }
+}
+EXPORT_SYMBOL(kern_unmount);