1 files changed, 13 insertions, 6 deletions

diff --git a/include/net/sock.h b/include/net/sock.h
index 7b3d6b856946..324b3ea233d6 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -44,6 +44,7 @@
 #include <linux/timer.h>
 #include <linux/cache.h>
 #include <linux/module.h>
+#include <linux/lockdep.h>
 #include <linux/netdevice.h>
 #include <linux/skbuff.h>       /* struct sk_buff */
 #include <linux/security.h>
@@ -78,14 +79,17 @@ typedef struct {
         spinlock_t              slock;
         struct sock_iocb        *owner;
         wait_queue_head_t       wq;
+        /*
+         * We express the mutex-alike socket_lock semantics
+         * to the lock validator by explicitly managing
+         * the slock as a lock variant (in addition to
+         * the slock itself):
+         */
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+        struct lockdep_map dep_map;
+#endif
 } socket_lock_t;
 
-#define sock_lock_init(__sk) \
-do {    spin_lock_init(&((__sk)->sk_lock.slock)); \
-        (__sk)->sk_lock.owner = NULL; \
-        init_waitqueue_head(&((__sk)->sk_lock.wq)); \
-} while(0)
-
 struct sock;
 struct proto;
 
@@ -747,6 +751,9 @@ extern void FASTCALL(release_sock(struct sock *sk));
 
 /* BH context may only use the following locking interface. */
 #define bh_lock_sock(__sk)      spin_lock(&((__sk)->sk_lock.slock))
+#define bh_lock_sock_nested(__sk) \
+                                spin_lock_nested(&((__sk)->sk_lock.slock), \
+                                SINGLE_DEPTH_NESTING)
 #define bh_unlock_sock(__sk)    spin_unlock(&((__sk)->sk_lock.slock))
 
 extern struct sock              *sk_alloc(int family,