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

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

3 files changed, 26 insertions, 25 deletions

diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c
index 81a53791ed9c..aed61e6376ed 100644
--- a/net/llc/af_llc.c
+++ b/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)
diff --git a/net/llc/llc_conn.c b/net/llc/llc_conn.c
index 1f659e56d8e2..ce7b893ed1ab 100644
--- a/net/llc/llc_conn.c
+++ b/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;
diff --git a/net/llc/llc_input.c b/net/llc/llc_input.c
index 13b46240b7a1..60c1acac7c97 100644
--- a/net/llc/llc_input.c
+++ b/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;