sysctl: A more obvious version of grab_header.

Instead of relying on sysct_head_next(NULL) to magically
return the right header for the root directory instead
explicitly transform NULL into the root directories header.

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

1 files changed, 4 insertions, 4 deletions

diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index e573f9b4f22..15444850b3e 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -267,10 +267,10 @@ static struct ctl_table *find_in_table(struct ctl_table *p, struct qstr *name)
 
 static struct ctl_table_header *grab_header(struct inode *inode)
 {
-        if (PROC_I(inode)->sysctl)
-                return sysctl_head_grab(PROC_I(inode)->sysctl);
-        else
-                return sysctl_head_next(NULL);
+        struct ctl_table_header *head = PROC_I(inode)->sysctl;
+        if (!head)
+                head = &root_table_header;
+        return sysctl_head_grab(head);
 }
 
 static struct dentry *proc_sys_lookup(struct inode *dir, struct dentry *dentry,