[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 <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 14 insertions, 6 deletions

diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
index 323d42a7b360..4a31a81059ab 100644
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c
@@ -116,7 +116,7 @@ int rosecmp(rose_address *addr1, rose_address *addr2)
  */
 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
 {
-        int i, j;
+        unsigned int i, j;
 
         if (mask > 10)
                 return 1;
@@ -973,8 +973,8 @@ int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct ros
          */
         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;
@@ -1377,6 +1377,7 @@ static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 
 #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;
@@ -1404,6 +1405,7 @@ static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
 }
 
 static void rose_info_stop(struct seq_file *seq, void *v)
+        __releases(rose_list_lock)
 {
         spin_unlock_bh(&rose_list_lock);
 }
diff --git a/net/rose/rose_in.c b/net/rose/rose_in.c
index 4ee0879d3540..7f7fcb46b4fa 100644
--- a/net/rose/rose_in.c
+++ b/net/rose/rose_in.c
@@ -182,7 +182,7 @@ static int rose_state3_machine(struct sock *sk, struct sk_buff *skb, int framety
                                 break;
                         }
                         if (atomic_read(&sk->sk_rmem_alloc) >
-                            (sk->sk_rcvbuf / 2))
+                            (sk->sk_rcvbuf >> 1))
                                 rose->condition |= ROSE_COND_OWN_RX_BUSY;
                 }
                 /*
diff --git a/net/rose/rose_route.c b/net/rose/rose_route.c
index 540c0f26ffee..fb9359fb2358 100644
--- a/net/rose/rose_route.c
+++ b/net/rose/rose_route.c
@@ -994,8 +994,8 @@ int rose_route_frame(struct sk_buff *skb, ax25_cb *ax25)
                 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));
 
@@ -1068,6 +1068,7 @@ out:
 #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;
@@ -1091,6 +1092,7 @@ static void *rose_node_next(struct seq_file *seq, void *v, loff_t *pos)
 }
 
 static void rose_node_stop(struct seq_file *seq, void *v)
+        __releases(rose_neigh_list_lock)
 {
         spin_unlock_bh(&rose_neigh_list_lock);
 }
@@ -1144,6 +1146,7 @@ const struct file_operations rose_nodes_fops = {
 };
 
 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;
@@ -1167,6 +1170,7 @@ static void *rose_neigh_next(struct seq_file *seq, void *v, loff_t *pos)
 }
 
 static void rose_neigh_stop(struct seq_file *seq, void *v)
+        __releases(rose_neigh_list_lock)
 {
         spin_unlock_bh(&rose_neigh_list_lock);
 }
@@ -1227,6 +1231,7 @@ const struct file_operations rose_neigh_fops = {
 
 
 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;
@@ -1250,6 +1255,7 @@ static void *rose_route_next(struct seq_file *seq, void *v, loff_t *pos)
 }
 
 static void rose_route_stop(struct seq_file *seq, void *v)
+        __releases(rose_route_list_lock)
 {
         spin_unlock_bh(&rose_route_list_lock);
 }