make __d_alloc() static

no users outside of fs/dcache.c

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/dcache.c b/fs/dcache.c
index e88cf05..8ede5fa 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1679,7 +1679,7 @@ EXPORT_SYMBOL(d_invalidate);
  * copied and the copy passed in may be reused after this call.
  */
  
-struct dentry *__d_alloc(struct super_block *sb, const struct qstr *name)
+static struct dentry *__d_alloc(struct super_block *sb, const struct qstr *name)
 {
 	struct dentry *dentry;
 	char *dname;