get rid of full-hash scan on detaching vfsmounts
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/mount.h b/fs/mount.h
index cd50079..64a8581 100644
--- a/fs/mount.h
+++ b/fs/mount.h
@@ -18,6 +18,12 @@
int mnt_writers;
};
+struct mountpoint {
+ struct list_head m_hash;
+ struct dentry *m_dentry;
+ int m_count;
+};
+
struct mount {
struct list_head mnt_hash;
struct mount *mnt_parent;
@@ -40,6 +46,7 @@
struct list_head mnt_slave; /* slave list entry */
struct mount *mnt_master; /* slave is on master->mnt_slave_list */
struct mnt_namespace *mnt_ns; /* containing namespace */
+ struct mountpoint *mnt_mp; /* where is it mounted */
#ifdef CONFIG_FSNOTIFY
struct hlist_head mnt_fsnotify_marks;
__u32 mnt_fsnotify_mask;
