[BLUETOOTH] lockdep: annotate sk_lock nesting in AF_BLUETOOTH

=============================================
[ INFO: possible recursive locking detected ]
2.6.18-1.2726.fc6 #1

diff --git a/include/net/sock.h b/include/net/sock.h
index 9cdbae2..35ffbdd 100644 (file)
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -745,7 +745,13 @@ static inline int sk_stream_wmem_schedule(struct sock *sk, int size)
  */
 #define sock_owned_by_user(sk) ((sk)->sk_lock.owner)
 
-extern void FASTCALL(lock_sock(struct sock *sk));
+extern void FASTCALL(lock_sock_nested(struct sock *sk, int subclass));
+
+static inline void lock_sock(struct sock *sk)
+{
+       lock_sock_nested(sk, 0);
+}
+
 extern void FASTCALL(release_sock(struct sock *sk));
 
 /* BH context may only use the following locking interface. */

diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index bbf78e6..29a8fa4 100644 (file)
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -770,7 +770,7 @@ static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int fl
        long timeo;
        int err = 0;
 
-       lock_sock(sk);
+       lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
 
        if (sk->sk_state != BT_LISTEN) {
                err = -EBADFD;
@@ -792,7 +792,7 @@ static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int fl
 
                release_sock(sk);
                timeo = schedule_timeout(timeo);
-               lock_sock(sk);
+               lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
 
                if (sk->sk_state != BT_LISTEN) {
                        err = -EBADFD;

diff --git a/net/core/sock.c b/net/core/sock.c
index ee6cd25..32ff1c5 100644 (file)
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1527,7 +1527,7 @@ void sock_init_data(struct socket *sock, struct sock *sk)
        atomic_set(&sk->sk_refcnt, 1);
 }
 
-void fastcall lock_sock(struct sock *sk)
+void fastcall lock_sock_nested(struct sock *sk, int subclass)
 {
        might_sleep();
        spin_lock_bh(&sk->sk_lock.slock);
@@ -1538,11 +1538,11 @@ void fastcall lock_sock(struct sock *sk)
        /*
         * The sk_lock has mutex_lock() semantics here:
         */
-       mutex_acquire(&sk->sk_lock.dep_map, 0, 0, _RET_IP_);
+       mutex_acquire(&sk->sk_lock.dep_map, subclass, 0, _RET_IP_);
        local_bh_enable();
 }
 
-EXPORT_SYMBOL(lock_sock);
+EXPORT_SYMBOL(lock_sock_nested);
 
 void fastcall release_sock(struct sock *sk)
 {