diff --git a/.gitignore b/.gitignore
index 3dce026..8809f25 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@
 !lib-common/uclibc/lib/*
 !kernel/src/memory/mm_malloc.o
 !testcase/user.ld
+!/git-*
diff --git a/git-diff b/git-diff
new file mode 100755
index 0000000..6648027
--- /dev/null
+++ b/git-diff
@@ -0,0 +1,2 @@
+#!/bin/bash
+git log --author=15 --format=%H -n 1 | xargs git diff $@