[NET]: Change type of owner in sock_lock_t to int, rename

The type of owner in sock_lock_t is currently (struct sock_iocb *),
presumably for historical reasons.  It is never used as this type, only
tested as NULL or set to (void *)1.  For clarity, this changes it to type
int, and renames to owned, to avoid any possible type casting errors.

Signed-off-by: John Heffner <jheffner@psc.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 6 insertions, 7 deletions

diff --git a/include/net/sock.h b/include/net/sock.h
index 802c670ba820..5ed9fa42b6e8 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -76,10 +76,9 @@
  * between user contexts and software interrupt processing, whereas the
  * mini-semaphore synchronizes multiple users amongst themselves.
  */
-struct sock_iocb;
 typedef struct {
         spinlock_t              slock;
-        struct sock_iocb        *owner;
+        int                     owned;
         wait_queue_head_t       wq;
         /*
          * We express the mutex-alike socket_lock semantics
@@ -737,7 +736,7 @@ static inline int sk_stream_wmem_schedule(struct sock *sk, int size)
  * Since ~2.3.5 it is also exclusive sleep lock serializing
  * accesses from user process context.
  */
-#define sock_owned_by_user(sk)  ((sk)->sk_lock.owner)
+#define sock_owned_by_user(sk)  ((sk)->sk_lock.owned)
 
 /*
  * Macro so as to not evaluate some arguments when
@@ -748,7 +747,7 @@ static inline int sk_stream_wmem_schedule(struct sock *sk, int size)
  */
 #define sock_lock_init_class_and_name(sk, sname, skey, name, key)       \
 do {                                                                    \
-        sk->sk_lock.owner = NULL;                                       \
+        sk->sk_lock.owned = 0;                                  \
         init_waitqueue_head(&sk->sk_lock.wq);                           \
         spin_lock_init(&(sk)->sk_lock.slock);                           \
         debug_check_no_locks_freed((void *)&(sk)->sk_lock,              \
diff --git a/net/core/sock.c b/net/core/sock.c
index 190de61cd648..beb924c248e8 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1585,9 +1585,9 @@ void fastcall lock_sock_nested(struct sock *sk, int subclass)
 {
         might_sleep();
         spin_lock_bh(&sk->sk_lock.slock);
-        if (sk->sk_lock.owner)
+        if (sk->sk_lock.owned)
                 __lock_sock(sk);
-        sk->sk_lock.owner = (void *)1;
+        sk->sk_lock.owned = 1;
         spin_unlock(&sk->sk_lock.slock);
         /*
          * The sk_lock has mutex_lock() semantics here:
@@ -1608,7 +1608,7 @@ void fastcall release_sock(struct sock *sk)
         spin_lock_bh(&sk->sk_lock.slock);
         if (sk->sk_backlog.tail)
                 __release_sock(sk);
-        sk->sk_lock.owner = NULL;
+        sk->sk_lock.owned = 0;
         if (waitqueue_active(&sk->sk_lock.wq))
                 wake_up(&sk->sk_lock.wq);
         spin_unlock_bh(&sk->sk_lock.slock);