[SCTP]: Use sock_owned_by_user.

include/net/sctp/sctp.h

@@ -198,7 +198,6 @@ extern void sctp_hash_digest(const char *secret, const int secret_len,
 #define sctp_release_sock(sk) release_sock(sk)
 #define sctp_bh_lock_sock(sk) bh_lock_sock(sk)
 #define sctp_bh_unlock_sock(sk) bh_unlock_sock(sk)
-#define __sctp_sock_busy(sk) ((sk)->lock.users)
 #define SCTP_SOCK_SLEEP_PRE(sk) SOCK_SLEEP_PRE(sk)
 #define SCTP_SOCK_SLEEP_POST(sk) SOCK_SLEEP_POST(sk)
 

net/sctp/input.c

@@ -229,7 +229,7 @@ int sctp_rcv(struct sk_buff *skb)
 	 */
 	sctp_bh_lock_sock(sk);
 
-	if (__sctp_sock_busy(sk)) {
+	if (sock_owned_by_user(sk)) {
 		sk_add_backlog(sk, (struct sk_buff *) chunk);
 	} else {
 		sctp_backlog_rcv(sk, (struct sk_buff *) chunk);

net/sctp/sm_sideeffect.c

@@ -798,7 +798,7 @@ void sctp_generate_t3_rtx_event(unsigned long peer)
 	/* Check whether a task is in the sock.  */
 
 	sctp_bh_lock_sock(asoc->base.sk);
-	if (__sctp_sock_busy(asoc->base.sk)) {
+	if (sock_owned_by_user(asoc->base.sk)) {
 		SCTP_DEBUG_PRINTK("%s:Sock is busy.\n", __FUNCTION__);
 
 		/* Try again later.  */
@@ -837,7 +837,7 @@ static void sctp_generate_timeout_event(sctp_association_t *asoc,
 	int error = 0;
 
 	sctp_bh_lock_sock(asoc->base.sk);
-	if (__sctp_sock_busy(asoc->base.sk)) {
+	if (sock_owned_by_user(asoc->base.sk)) {
 		SCTP_DEBUG_PRINTK("%s:Sock is busy: timer %d\n",
 				  __FUNCTION__,
 				  timeout_type);
@@ -911,7 +911,7 @@ void sctp_generate_heartbeat_event(unsigned long data)
 	sctp_association_t *asoc = transport->asoc;
 
 	sctp_bh_lock_sock(asoc->base.sk);
-	if (__sctp_sock_busy(asoc->base.sk)) {
+	if (sock_owned_by_user(asoc->base.sk)) {
 		SCTP_DEBUG_PRINTK("%s:Sock is busy.\n", __FUNCTION__);
 
 		/* Try again later.  */