X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=fs%2Fnamespace.c;h=22bfe8273c680b441f43a0191c7bd0e805a51ec2;hb=61e76d3ecba54ece596b07d33e0965d2ffcad87a;hp=cda50fe9250ac3e7eb52d6a56143731505ef732f;hpb=99b1bb61b225c3eb4d3b196d4f1d041695b19a7e;p=karo-tx-linux.git

diff --git a/fs/namespace.c b/fs/namespace.c
index cda50fe9250a..22bfe8273c68 100644
--- 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);