[ROSE]: Supress sparse warnings

CHECK net/rose/af_rose.c
net/rose/af_rose.c:125:11: warning: expensive signed divide
net/rose/af_rose.c:976:46: warning: expensive signed divide
net/rose/af_rose.c:1379:13: warning: context imbalance in 'rose_info_start' - wrong count at exit
net/rose/af_rose.c:1406:13: warning: context imbalance in 'rose_info_stop' - unexpected unlock
CHECK net/rose/rose_in.c
net/rose/rose_in.c:185:25: warning: expensive signed divide
CHECK net/rose/rose_route.c
net/rose/rose_route.c:997:46: warning: expensive signed divide
net/rose/rose_route.c:1070:13: warning: context imbalance in 'rose_node_start' - wrong count at exit
net/rose/rose_route.c:1093:13: warning: context imbalance in 'rose_node_stop' - unexpected unlock
net/rose/rose_route.c:1146:13: warning: context imbalance in 'rose_neigh_start' - wrong count at exit
net/rose/rose_route.c:1169:13: warning: context imbalance in 'rose_neigh_stop' - unexpected unlock
net/rose/rose_route.c:1229:13: warning: context imbalance in 'rose_route_start' - wrong count at exit
net/rose/rose_route.c:1252:13: warning: context imbalance in 'rose_route_stop' - unexpected unlock

Signed-off-by: Eric Dumazet <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/rose/af_rose.c

···
  */
 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
 {
-	int i, j;
+	unsigned int i, j;
 
 	if (mask > 10)
 		return 1;
···
 	 */
 	memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 
-	len  = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;
-	len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;
+	len  = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
+	len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
 	if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
 		rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
 		return 0;
···
 
 #ifdef CONFIG_PROC_FS
 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
+	__acquires(rose_list_lock)
 {
 	int i;
 	struct sock *s;
···
 }
 
 static void rose_info_stop(struct seq_file *seq, void *v)
+	__releases(rose_list_lock)
 {
 	spin_unlock_bh(&rose_list_lock);
 }

net/rose/rose_in.c

···
 				break;
 			}
 			if (atomic_read(&sk->sk_rmem_alloc) >
-			    (sk->sk_rcvbuf / 2))
+			    (sk->sk_rcvbuf >> 1))
 				rose->condition |= ROSE_COND_OWN_RX_BUSY;
 		}
 		/*

net/rose/rose_route.c

···
 		goto out;
 	}
 
-	len  = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;
-	len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;
+	len  = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
+	len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
 
 	memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 
···
 #ifdef CONFIG_PROC_FS
 
 static void *rose_node_start(struct seq_file *seq, loff_t *pos)
+	__acquires(rose_neigh_list_lock)
 {
 	struct rose_node *rose_node;
 	int i = 1;
···
 }
 
 static void rose_node_stop(struct seq_file *seq, void *v)
+	__releases(rose_neigh_list_lock)
 {
 	spin_unlock_bh(&rose_neigh_list_lock);
 }
···
 };
 
 static void *rose_neigh_start(struct seq_file *seq, loff_t *pos)
+	__acquires(rose_neigh_list_lock)
 {
 	struct rose_neigh *rose_neigh;
 	int i = 1;
···
 }
 
 static void rose_neigh_stop(struct seq_file *seq, void *v)
+	__releases(rose_neigh_list_lock)
 {
 	spin_unlock_bh(&rose_neigh_list_lock);
 }
···
 
 
 static void *rose_route_start(struct seq_file *seq, loff_t *pos)
+	__acquires(rose_route_list_lock)
 {
 	struct rose_route *rose_route;
 	int i = 1;
···
 }
 
 static void rose_route_stop(struct seq_file *seq, void *v)
+	__releases(rose_route_list_lock)
 {
 	spin_unlock_bh(&rose_route_list_lock);
 }