diff --git a/fs/btrfs/hash.c b/fs/btrfs/hash.c
index 6c2a71a..22519b8 100644
--- a/fs/btrfs/hash.c
+++ b/fs/btrfs/hash.c
@@ -10,6 +10,7 @@
  * License.
  */
 
+#include <linux/types.h>
 #define DELTA 0x9E3779B9
 
 static void TEA_transform(__u32 buf[2], __u32 const in[])
@@ -63,6 +64,14 @@
 	const char	*p;
 	__u32		in[8], buf[2];
 
+	if (len == 1 && *name == '.') {
+		*hash_result = 1;
+		return 0;
+	} else if (len == 2 && name[0] == '.' && name[1] == '.') {
+		*hash_result = 2;
+		return 0;
+	}
+
 	/* Initialize the default seed for the hash checksum functions */
 	buf[0] = 0x67452301;
 	buf[1] = 0xefcdab89;