fs: mark __d_obtain_alias static

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/dcache.c b/fs/dcache.c
index ad13700..d30ce69 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1775,7 +1775,7 @@
 }
 EXPORT_SYMBOL(d_find_any_alias);
 
-struct dentry *__d_obtain_alias(struct inode *inode, int disconnected)
+static struct dentry *__d_obtain_alias(struct inode *inode, int disconnected)
 {
 	static const struct qstr anonstring = QSTR_INIT("/", 1);
 	struct dentry *tmp;