[NET]: Add some acquires/releases sparse annotations.

[linux-2.6] / net / core / dev_mcast.c

diff --git a/net/core/dev_mcast.c b/net/core/dev_mcast.c
index 69fff16ece10c70c3c94d2624a2d1086a23e26a8..cadbfbf7e7f57a687f4f134030b106a4781f4715 100644 (file)
--- a/net/core/dev_mcast.c
+++ b/net/core/dev_mcast.c
@@ -186,8 +186,9 @@ EXPORT_SYMBOL(dev_mc_unsync);
 
 #ifdef CONFIG_PROC_FS
 static void *dev_mc_seq_start(struct seq_file *seq, loff_t *pos)
+       __acquires(dev_base_lock)
 {
-       struct net *net = seq->private;
+       struct net *net = seq_file_net(seq);
        struct net_device *dev;
        loff_t off = 0;
 
@@ -206,6 +207,7 @@ static void *dev_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 }
 
 static void dev_mc_seq_stop(struct seq_file *seq, void *v)
+       __releases(dev_base_lock)
 {
        read_unlock(&dev_base_lock);
 }
@@ -241,26 +243,8 @@ static const struct seq_operations dev_mc_seq_ops = {
 
 static int dev_mc_seq_open(struct inode *inode, struct file *file)
 {
-       struct seq_file *seq;
-       int res;
-       res = seq_open(file, &dev_mc_seq_ops);
-       if (!res) {
-               seq = file->private_data;
-               seq->private = get_proc_net(inode);
-               if (!seq->private) {
-                       seq_release(inode, file);
-                       res = -ENXIO;
-               }
-       }
-       return res;
-}
-
-static int dev_mc_seq_release(struct inode *inode, struct file *file)
-{
-       struct seq_file *seq = file->private_data;
-       struct net *net = seq->private;
-       put_net(net);
-       return seq_release(inode, file);
+       return seq_open_net(inode, file, &dev_mc_seq_ops,
+                           sizeof(struct seq_net_private));
 }
 
 static const struct file_operations dev_mc_seq_fops = {
@@ -268,7 +252,7 @@ static const struct file_operations dev_mc_seq_fops = {
        .open    = dev_mc_seq_open,
        .read    = seq_read,
        .llseek  = seq_lseek,
-       .release = dev_mc_seq_release,
+       .release = seq_release_net,
 };
 
 #endif