[PATCH net-next] pptp: fix sparse pointer warning

callid_sock array is referenced via rcu_dereference and
sparse rcu checks complains about address space mismatch.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

--- a/drivers/net/ppp/pptp.c	2013-05-11 15:58:52.472353116 -0700
+++ b/drivers/net/ppp/pptp.c	2013-07-30 14:40:52.602172742 -0700

@@ -47,7 +47,7 @@
 #define MAX_CALLID 65535
 
 static DECLARE_BITMAP(callid_bitmap, MAX_CALLID + 1);
-static struct pppox_sock **callid_sock;
+static struct pppox_sock __rcu **callid_sock;
 
 static DEFINE_SPINLOCK(chan_lock);
 

From: Stephen Hemminger <stephen@networkplumber.org>
Date: Thu, 8 Aug 2013 10:27:14 -0700

callid_sock array is referenced via rcu_dereference and
sparse rcu checks complains about address space mismatch.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

Applied, thanks.