Exclude generated files

.gitignore

@@ -1,5 +1,6 @@
 # Linux kernel build system
 *.o
+*.o.d
 *.ko
 *cmd
 *.dwo
@@ -34,4 +35,4 @@ lkmpg.pdf
 *.xref
 
 # format checks
-expected-format
+expected-format