From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 5 Feb 2010 14:30:46 +0000 (-0500)
Subject: Mirror MS_KERNMOUNT in ->mnt_flags
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8089352a13b785d4e0df63d87bd2b71c76bb9aee;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

Mirror MS_KERNMOUNT in ->mnt_flags

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/namespace.c b/fs/namespace.c
index b0b15cc2117c..ffa3843404e0 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1701,7 +1701,7 @@ int do_add_mount(struct vfsmount *newmnt, struct path *path,
 {
 	int err;
 
-	mnt_flags &= ~(MNT_SHARED | MNT_WRITE_HOLD);
+	mnt_flags &= ~(MNT_SHARED | MNT_WRITE_HOLD | MNT_INTERNAL);
 
 	down_write(&namespace_sem);
 	/* Something was mounted here while we slept */
diff --git a/fs/super.c b/fs/super.c
index 903896ec7c73..f35ac6022109 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -937,6 +937,9 @@ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void
 	if (!mnt)
 		goto out;
 
+	if (flags & MS_KERNMOUNT)
+		mnt->mnt_flags = MNT_INTERNAL;
+
 	if (data && !(type->fs_flags & FS_BINARY_MOUNTDATA)) {
 		secdata = alloc_secdata();
 		if (!secdata)
diff --git a/include/linux/mount.h b/include/linux/mount.h
index 163896137ab5..ca726ebf50a3 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -45,6 +45,8 @@ struct mnt_namespace;
 #define MNT_PROPAGATION_MASK	(MNT_SHARED | MNT_UNBINDABLE)
 
 
+#define MNT_INTERNAL	0x4000
+
 struct vfsmount {
 	struct list_head mnt_hash;
 	struct vfsmount *mnt_parent;	/* fs we are mounted on */