--- linux-2.6.12.5/Makefile.old	2005-10-23 22:56:29.017270000 +0200
+++ linux-2.6.12.5/Makefile	2005-10-23 22:57:23.226138500 +0200
@@ -533,6 +533,9 @@
 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 
+# improve gcc optimization
+CFLAGS += $(call cc-option,-funit-at-a-time,)
+
 # warn about C99 declaration after statement
 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)