From 26bad2c05eef400d9af16979bd96e301902ebd13 Mon Sep 17 00:00:00 2001
From: Matthias Kaehlcke <matthias@kaehlcke.net>
Date: Mon, 3 Mar 2008 23:35:53 -0800
Subject: [PATCH] [TIPC]: Convert tsock->sem in a mutex

The semaphore tsock->sem is used as mutex, convert it to the mutex API

Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/tipc/socket.c | 56 +++++++++++++++++++++++------------------------
 1 file changed, 28 insertions(+), 28 deletions(-)

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 22909036b9bc..9ae8e9f74028 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -43,7 +43,7 @@
 #include <linux/slab.h>
 #include <linux/poll.h>
 #include <linux/fcntl.h>
-#include <asm/semaphore.h>
+#include <linux/mutex.h>
 #include <asm/string.h>
 #include <asm/atomic.h>
 #include <net/sock.h>
@@ -63,7 +63,7 @@
 struct tipc_sock {
 	struct sock sk;
 	struct tipc_port *p;
-	struct semaphore sem;
+	struct mutex lock;
 };
 
 #define tipc_sk(sk) ((struct tipc_sock*)sk)
@@ -217,7 +217,7 @@ static int tipc_create(struct net *net, struct socket *sock, int protocol)
 	tsock->p = port;
 	port->usr_handle = tsock;
 
-	init_MUTEX(&tsock->sem);
+	mutex_init(&tsock->lock);
 
 	dbg("sock_create: %x\n",tsock);
 
@@ -253,9 +253,9 @@ static int release(struct socket *sock)
 	dbg("sock_delete: %x\n",tsock);
 	if (!tsock)
 		return 0;
-	down(&tsock->sem);
+	mutex_lock(&tsock->lock);
 	if (!sock->sk) {
-		up(&tsock->sem);
+		mutex_unlock(&tsock->lock);
 		return 0;
 	}
 
@@ -288,7 +288,7 @@ static int release(struct socket *sock)
 		atomic_dec(&tipc_queue_size);
 	}
 
-	up(&tsock->sem);
+	mutex_unlock(&tsock->lock);
 
 	sock_put(sk);
 
@@ -315,7 +315,7 @@ static int bind(struct socket *sock, struct sockaddr *uaddr, int uaddr_len)
 	struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr;
 	int res;
 
-	if (down_interruptible(&tsock->sem))
+	if (mutex_lock_interruptible(&tsock->lock))
 		return -ERESTARTSYS;
 
 	if (unlikely(!uaddr_len)) {
@@ -346,7 +346,7 @@ static int bind(struct socket *sock, struct sockaddr *uaddr, int uaddr_len)
 		res = tipc_withdraw(tsock->p->ref, -addr->scope,
 				    &addr->addr.nameseq);
 exit:
-	up(&tsock->sem);
+	mutex_unlock(&tsock->lock);
 	return res;
 }
 
@@ -367,7 +367,7 @@ static int get_name(struct socket *sock, struct sockaddr *uaddr,
 	struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr;
 	u32 res;
 
-	if (down_interruptible(&tsock->sem))
+	if (mutex_lock_interruptible(&tsock->lock))
 		return -ERESTARTSYS;
 
 	*uaddr_len = sizeof(*addr);
@@ -380,7 +380,7 @@ static int get_name(struct socket *sock, struct sockaddr *uaddr,
 		res = tipc_ownidentity(tsock->p->ref, &addr->addr.id);
 	addr->addr.name.domain = 0;
 
-	up(&tsock->sem);
+	mutex_unlock(&tsock->lock);
 	return res;
 }
 
@@ -477,7 +477,7 @@ static int send_msg(struct kiocb *iocb, struct socket *sock,
 		}
 	}
 
-	if (down_interruptible(&tsock->sem))
+	if (mutex_lock_interruptible(&tsock->lock))
 		return -ERESTARTSYS;
 
 	if (needs_conn) {
@@ -523,7 +523,7 @@ static int send_msg(struct kiocb *iocb, struct socket *sock,
 		}
 		if (likely(res != -ELINKCONG)) {
 exit:
-			up(&tsock->sem);
+			mutex_unlock(&tsock->lock);
 			return res;
 		}
 		if (m->msg_flags & MSG_DONTWAIT) {
@@ -562,7 +562,7 @@ static int send_packet(struct kiocb *iocb, struct socket *sock,
 	if (unlikely(dest))
 		return send_msg(iocb, sock, m, total_len);
 
-	if (down_interruptible(&tsock->sem)) {
+	if (mutex_lock_interruptible(&tsock->lock)) {
 		return -ERESTARTSYS;
 	}
 
@@ -578,7 +578,7 @@ static int send_packet(struct kiocb *iocb, struct socket *sock,
 		res = tipc_send(tsock->p->ref, m->msg_iovlen, m->msg_iov);
 		if (likely(res != -ELINKCONG)) {
 exit:
-			up(&tsock->sem);
+			mutex_unlock(&tsock->lock);
 			return res;
 		}
 		if (m->msg_flags & MSG_DONTWAIT) {
@@ -846,7 +846,7 @@ static int recv_msg(struct kiocb *iocb, struct socket *sock,
 
 	/* Look for a message in receive queue; wait if necessary */
 
-	if (unlikely(down_interruptible(&tsock->sem)))
+	if (unlikely(mutex_lock_interruptible(&tsock->lock)))
 		return -ERESTARTSYS;
 
 restart:
@@ -930,7 +930,7 @@ restart:
 		advance_queue(tsock);
 	}
 exit:
-	up(&tsock->sem);
+	mutex_unlock(&tsock->lock);
 	return res;
 }
 
@@ -981,7 +981,7 @@ static int recv_stream(struct kiocb *iocb, struct socket *sock,
 
 	/* Look for a message in receive queue; wait if necessary */
 
-	if (unlikely(down_interruptible(&tsock->sem)))
+	if (unlikely(mutex_lock_interruptible(&tsock->lock)))
 		return -ERESTARTSYS;
 
 restart:
@@ -1077,7 +1077,7 @@ restart:
 		goto restart;
 
 exit:
-	up(&tsock->sem);
+	mutex_unlock(&tsock->lock);
 	return sz_copied ? sz_copied : res;
 }
 
@@ -1293,7 +1293,7 @@ static int connect(struct socket *sock, struct sockaddr *dest, int destlen,
 	   return res;
    }
 
-   if (down_interruptible(&tsock->sem))
+   if (mutex_lock_interruptible(&tsock->lock))
 	   return -ERESTARTSYS;
 
    /* Wait for destination's 'ACK' response */
@@ -1317,7 +1317,7 @@ static int connect(struct socket *sock, struct sockaddr *dest, int destlen,
 	   sock->state = SS_DISCONNECTING;
    }
 
-   up(&tsock->sem);
+   mutex_unlock(&tsock->lock);
    return res;
 }
 
@@ -1365,7 +1365,7 @@ static int accept(struct socket *sock, struct socket *newsock, int flags)
 		     (flags & O_NONBLOCK)))
 		return -EWOULDBLOCK;
 
-	if (down_interruptible(&tsock->sem))
+	if (mutex_lock_interruptible(&tsock->lock))
 		return -ERESTARTSYS;
 
 	if (wait_event_interruptible(*sock->sk->sk_sleep,
@@ -1412,7 +1412,7 @@ static int accept(struct socket *sock, struct socket *newsock, int flags)
 		}
 	}
 exit:
-	up(&tsock->sem);
+	mutex_unlock(&tsock->lock);
 	return res;
 }
 
@@ -1434,7 +1434,7 @@ static int shutdown(struct socket *sock, int how)
 
 	/* Could return -EINVAL for an invalid "how", but why bother? */
 
-	if (down_interruptible(&tsock->sem))
+	if (mutex_lock_interruptible(&tsock->lock))
 		return -ERESTARTSYS;
 
 	sock_lock(tsock);
@@ -1484,7 +1484,7 @@ restart:
 
 	sock_unlock(tsock);
 
-	up(&tsock->sem);
+	mutex_unlock(&tsock->lock);
 	return res;
 }
 
@@ -1518,7 +1518,7 @@ static int setsockopt(struct socket *sock,
 	if ((res = get_user(value, (u32 __user *)ov)))
 		return res;
 
-	if (down_interruptible(&tsock->sem))
+	if (mutex_lock_interruptible(&tsock->lock))
 		return -ERESTARTSYS;
 
 	switch (opt) {
@@ -1541,7 +1541,7 @@ static int setsockopt(struct socket *sock,
 		res = -EINVAL;
 	}
 
-	up(&tsock->sem);
+	mutex_unlock(&tsock->lock);
 	return res;
 }
 
@@ -1574,7 +1574,7 @@ static int getsockopt(struct socket *sock,
 	if ((res = get_user(len, ol)))
 		return res;
 
-	if (down_interruptible(&tsock->sem))
+	if (mutex_lock_interruptible(&tsock->lock))
 		return -ERESTARTSYS;
 
 	switch (opt) {
@@ -1607,7 +1607,7 @@ static int getsockopt(struct socket *sock,
 		res = put_user(sizeof(value), ol);
 	}
 
-	up(&tsock->sem);
+	mutex_unlock(&tsock->lock);
 	return res;
 }
 
-- 
2.20.1