[PATCH] fs/namespace: make to_mnt_ns static

[Ben Dooks <ben.dooks@codethink.co.uk>]

The to_mnt_ns() is not exported outside the file so
make it static to fix the following sparse warning:

fs/namespace.c:1731:22: warning: symbol 'to_mnt_ns' was not declared. Should it be static?

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
---
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---
 fs/namespace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/namespace.c b/fs/namespace.c
index fe0e9e1410fe..b87b127fdce4 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1728,7 +1728,7 @@ static bool is_mnt_ns_file(struct dentry *dentry)
 	       dentry->d_fsdata == &mntns_operations;
 }
 
-struct mnt_namespace *to_mnt_ns(struct ns_common *ns)
+static struct mnt_namespace *to_mnt_ns(struct ns_common *ns)
 {
 	return container_of(ns, struct mnt_namespace, ns);
 }
-- 
2.23.0