[LLC]: Help the compiler with likely/unlikely, saving some more bytes

Signed-off-by: NJochen Friedrich <jochen@scram.de>
Signed-off-by: NArnaldo Carvalho de Melo <acme@mandriva.com>

net/llc/af_llc.c

@@ -155,7 +155,7 @@ static int llc_ui_create(struct socket *sock, int protocol)
 	struct sock *sk;
 	int rc = -ESOCKTNOSUPPORT;
 
-	if (sock->type == SOCK_DGRAM || sock->type == SOCK_STREAM) {
+	if (likely(sock->type == SOCK_DGRAM || sock->type == SOCK_STREAM)) {
 		rc = -ENOMEM;
 		sk = llc_sk_alloc(PF_LLC, GFP_KERNEL, &llc_proto);
 		if (sk) {
@@ -177,7 +177,7 @@ static int llc_ui_release(struct socket *sock)
 	struct sock *sk = sock->sk;
 	struct llc_sock *llc;
 
-	if (!sk)
+	if (unlikely(sk == NULL))
 		goto out;
 	sock_hold(sk);
 	lock_sock(sk);
@@ -294,10 +294,10 @@ static int llc_ui_bind(struct socket *sock, struct sockaddr *uaddr, int addrlen)
 	int rc = -EINVAL;
 
 	dprintk("%s: binding %02X\n", __FUNCTION__, addr->sllc_sap);
-	if (!sock_flag(sk, SOCK_ZAPPED) || addrlen != sizeof(*addr))
+	if (unlikely(!sock_flag(sk, SOCK_ZAPPED) || addrlen != sizeof(*addr)))
 		goto out;
 	rc = -EAFNOSUPPORT;
-	if (addr->sllc_family != AF_LLC)
+	if (unlikely(addr->sllc_family != AF_LLC))
 		goto out;
 	if (!addr->sllc_sap) {
 		rc = -EUSERS;
@@ -358,7 +358,7 @@ static int llc_ui_shutdown(struct socket *sock, int how)
 	int rc = -ENOTCONN;
 
 	lock_sock(sk);
-	if (sk->sk_state != TCP_ESTABLISHED)
+	if (unlikely(sk->sk_state != TCP_ESTABLISHED))
 		goto out;
 	rc = -EINVAL;
 	if (how != 2)
@@ -396,10 +396,15 @@ static int llc_ui_connect(struct socket *sock, struct sockaddr *uaddr,
 	int rc = -EINVAL;
 
 	lock_sock(sk);
-	if (addrlen != sizeof(*addr))
+	if (unlikely(addrlen != sizeof(*addr)))
 		goto out;
 	rc = -EAFNOSUPPORT;
-	if (addr->sllc_family != AF_LLC)
+	if (unlikely(addr->sllc_family != AF_LLC))
+		goto out;
+	if (unlikely(sk->sk_type != SOCK_STREAM))
+		goto out;
+	rc = -EALREADY;
+	if (unlikely(sock->state == SS_CONNECTING))
 		goto out;
 	/* bind connection to sap if user hasn't done it. */
 	if (sock_flag(sk, SOCK_ZAPPED)) {
@@ -410,11 +415,6 @@ static int llc_ui_connect(struct socket *sock, struct sockaddr *uaddr,
 		llc->daddr.lsap = addr->sllc_sap;
 		memcpy(llc->daddr.mac, addr->sllc_mac, IFHWADDRLEN);
 	}
-	if (sk->sk_type != SOCK_STREAM)
-		goto out;
-	rc = -EALREADY;
-	if (sock->state == SS_CONNECTING)
-		goto out;
 	sock->state = SS_CONNECTING;
 	sk->sk_state   = TCP_SYN_SENT;
 	llc->link   = llc_ui_next_link_no(llc->sap->laddr.lsap);
@@ -448,10 +448,10 @@ static int llc_ui_listen(struct socket *sock, int backlog)
 	int rc = -EINVAL;
 
 	lock_sock(sk);
-	if (sock->state != SS_UNCONNECTED)
+	if (unlikely(sock->state != SS_UNCONNECTED))
 		goto out;
 	rc = -EOPNOTSUPP;
-	if (sk->sk_type != SOCK_STREAM)
+	if (unlikely(sk->sk_type != SOCK_STREAM))
 		goto out;
 	rc = -EAGAIN;
 	if (sock_flag(sk, SOCK_ZAPPED))
@@ -614,10 +614,11 @@ static int llc_ui_accept(struct socket *sock, struct socket *newsock, int flags)
 	dprintk("%s: accepting on %02X\n", __FUNCTION__,
 	        llc_sk(sk)->laddr.lsap);
 	lock_sock(sk);
-	if (sk->sk_type != SOCK_STREAM)
+	if (unlikely(sk->sk_type != SOCK_STREAM))
 		goto out;
 	rc = -EINVAL;
-	if (sock->state != SS_UNCONNECTED || sk->sk_state != TCP_LISTEN)
+	if (unlikely(sock->state != SS_UNCONNECTED ||
+		     sk->sk_state != TCP_LISTEN))
 		goto out;
 	/* wait for a connection to arrive. */
 	rc = llc_ui_wait_for_data(sk, sk->sk_rcvtimeo);
@@ -880,7 +881,7 @@ static int llc_ui_setsockopt(struct socket *sock, int level, int optname,
 	int rc = -EINVAL, opt;
 
 	lock_sock(sk);
-	if (level != SOL_LLC || optlen != sizeof(int))
+	if (unlikely(level != SOL_LLC || optlen != sizeof(int)))
 		goto out;
 	rc = get_user(opt, (int __user *)optval);
 	if (rc)
@@ -955,7 +956,7 @@ static int llc_ui_getsockopt(struct socket *sock, int level, int optname,
 	int val = 0, len = 0, rc = -EINVAL;
 
 	lock_sock(sk);
-	if (level != SOL_LLC)
+	if (unlikely(level != SOL_LLC))
 		goto out;
 	rc = get_user(len, optlen);
 	if (rc)

net/llc/llc_conn.c

@@ -64,12 +64,12 @@ int llc_conn_state_process(struct sock *sk, struct sk_buff *skb)
 	skb_get(skb);
 	ev->ind_prim = ev->cfm_prim = 0;
 	rc = llc_conn_service(sk, skb); /* sending event to state machine */
-	if (rc) {
+	if (unlikely(rc != 0)) {
 		printk(KERN_ERR "%s: llc_conn_service failed\n", __FUNCTION__);
 		goto out_kfree_skb;
 	}
 
-	if (!ev->ind_prim && !ev->cfm_prim) {
+	if (unlikely(!ev->ind_prim && !ev->cfm_prim)) {
 		/* indicate or confirm not required */
 		/* XXX this is not very pretty, perhaps we should store
 		 * XXX indicate/confirm-needed state in the llc_conn_state_ev
@@ -80,7 +80,7 @@ int llc_conn_state_process(struct sock *sk, struct sk_buff *skb)
 		goto out_skb_put;
 	}
 
-	if (ev->ind_prim && ev->cfm_prim) /* Paranoia */
+	if (unlikely(ev->ind_prim && ev->cfm_prim)) /* Paranoia */
 		skb_get(skb);
 
 	switch (ev->ind_prim) {
@@ -762,14 +762,14 @@ static int llc_backlog_rcv(struct sock *sk, struct sk_buff *skb)
 	int rc = 0;
 	struct llc_sock *llc = llc_sk(sk);
 
-	if (llc_backlog_type(skb) == LLC_PACKET) {
-		if (llc->state > 1) /* not closed */
+	if (likely(llc_backlog_type(skb) == LLC_PACKET)) {
+		if (likely(llc->state > 1)) /* not closed */
 			rc = llc_conn_rcv(sk, skb);
 		else
 			goto out_kfree_skb;
 	} else if (llc_backlog_type(skb) == LLC_EVENT) {
 		/* timer expiration event */
-		if (llc->state > 1)  /* not closed */
+		if (likely(llc->state > 1))  /* not closed */
 			rc = llc_conn_state_process(sk, skb);
 		else
 			goto out_kfree_skb;

net/llc/llc_input.c

@@ -101,7 +101,7 @@ static inline int llc_fixup_skb(struct sk_buff *skb)
 	u8 llc_len = 2;
 	struct llc_pdu_sn *pdu;
 
-	if (!pskb_may_pull(skb, sizeof(*pdu)))
+	if (unlikely(!pskb_may_pull(skb, sizeof(*pdu))))
 		return 0;
 
 	pdu = (struct llc_pdu_sn *)skb->data;