fs/readdir.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/fs/readdir.c b/fs/readdir.c
index 19bea591c3f1..d49c4e2c66a8 100644
--- a/fs/readdir.c
+++ b/fs/readdir.c
@@ -76,6 +76,15 @@
 	unsafe_put_user(0, dst, label);				\
 } while (0)
 
+/* Alpha (and sparc?) test patch! */
+#undef unsafe_copy_dirent_name
+#define unsafe_copy_dirent_name(_dst, _src, _len, label) do {	\
+	char __user *dst = (_dst);				\
+	const char *src = (_src);				\
+	size_t len = (_len);					\
+	if (__copy_to_user(dst, src, len)) goto label;		\
+	unsafe_put_user(0, dst+len, label);			\
+} while (0)
 
 int iterate_dir(struct file *file, struct dir_context *ctx)
 {