net: move seq_file_single_net to <linux/seq_file_net.h>
This helper deals with single_{open,release}_net internals and thus
belongs here.
Signed-off-by: Christoph Hellwig <hch@lst.de>
diff --git a/include/linux/seq_file_net.h b/include/linux/seq_file_net.h
index 43ccd84..ed20faa 100644
--- a/include/linux/seq_file_net.h
+++ b/include/linux/seq_file_net.h
@@ -28,4 +28,17 @@ static inline struct net *seq_file_net(struct seq_file *seq)
#endif
}
+/*
+ * This one is needed for single_open_net since net is stored directly in
+ * private not as a struct i.e. seq_file_net can't be used.
+ */
+static inline struct net *seq_file_single_net(struct seq_file *seq)
+{
+#ifdef CONFIG_NET_NS
+ return (struct net *)seq->private;
+#else
+ return &init_net;
+#endif
+}
+
#endif