sysctl: Normalize the root_table data structure.

Every other directory has a .child member and we look at the .child
for our entries.  Do the same for the root_table.

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

diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 7e96a2681b60582f246ea9466fc83a3c2dbdfd40..88d1b06cc5c0d9b3abf5d4e37abfc583ad78ca0e 100644 (file)
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -25,7 +25,14 @@ void proc_sys_poll_notify(struct ctl_table_poll *poll)
        wake_up_interruptible(&poll->wait);
 }
 
-static struct ctl_table root_table[1];
+static struct ctl_table root_table[] = {
+       {
+               .procname = "",
+               .mode = S_IRUGO|S_IXUGO,
+               .child = &root_table[1],
+       },
+       { }
+};
 static struct ctl_table_root sysctl_table_root;
 static struct ctl_table_header root_table_header = {
        {{.count = 1,
@@ -319,7 +326,7 @@ static struct dentry *proc_sys_lookup(struct inode *dir, struct dentry *dentry,
                goto out;
        }
 
-       table = table ? table->child : head->ctl_table;
+       table = table ? table->child : &head->ctl_table[1];
 
        p = find_in_table(table, name);
        if (!p) {
@@ -510,7 +517,7 @@ static int proc_sys_readdir(struct file *filp, void *dirent, filldir_t filldir)
                goto out;
        }
 
-       table = table ? table->child : head->ctl_table;
+       table = table ? table->child : &head->ctl_table[1];
 
        ret = 0;
        /* Avoid a switch here: arm builds fail with missing __cmpdi2 */
@@ -966,7 +973,7 @@ struct ctl_table_header *__register_sysctl_table(
        spin_lock(&sysctl_lock);
        header->set = lookup_header_set(root, namespaces);
        header->attached_by = header->ctl_table;
-       header->attached_to = root_table;
+       header->attached_to = &root_table[1];
        header->parent = &root_table_header;
        set = header->set;
        root = header->root;