[PATCH] beginning of sysctl cleanup - ctl_table_set

New object: set of sysctls [currently - root and per-net-ns].
Contains: pointer to parent set, list of tables and "should I see this set?"
method (->is_seen(set)).
Current lists of tables are subsumed by that; net-ns contains such a beast.
->lookup() for ctl_table_root returns pointer to ctl_table_set instead of
that to ->list of that ctl_table_set.

[folded compile fixes by rdd for configs without sysctl]

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

1 files changed, 3 insertions, 1 deletions

diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index 3855620b78a9..a8eb43cf0c7e 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -38,7 +38,9 @@ struct net {
         struct proc_dir_entry   *proc_net;
         struct proc_dir_entry   *proc_net_stat;
 
-        struct list_head        sysctl_table_headers;
+#ifdef CONFIG_SYSCTL
+        struct ctl_table_set    sysctls;
+#endif
 
         struct net_device       *loopback_dev;          /* The loopback */