sysctl: Add a root pointer to ctl_table_set

Add a ctl_table_root pointer to ctl_table set so it is easy to
go from a ctl_table_set to a ctl_table_root.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index d9c3ae6afe4c..65c13dddceae 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -45,6 +45,7 @@ static struct ctl_table_header root_table_header = {
 static struct ctl_table_root sysctl_table_root = {
         .root_list = LIST_HEAD_INIT(sysctl_table_root.root_list),
         .default_set.list = LIST_HEAD_INIT(root_table_header.ctl_entry),
+        .default_set.root = &sysctl_table_root,
 };
 
 static DEFINE_SPINLOCK(sysctl_lock);
@@ -1348,9 +1349,11 @@ void unregister_sysctl_table(struct ctl_table_header * header)
 EXPORT_SYMBOL(unregister_sysctl_table);
 
 void setup_sysctl_set(struct ctl_table_set *p,
+        struct ctl_table_root *root,
         int (*is_seen)(struct ctl_table_set *))
 {
         INIT_LIST_HEAD(&p->list);
+        p->root = root;
         p->is_seen = is_seen;
 }