diff --git a/Documentation/dontdiff b/Documentation/dontdiff
index 5385cba941d2..a23edccd2059 100644
--- a/Documentation/dontdiff
+++ b/Documentation/dontdiff
@@ -139,7 +139,6 @@ hpet_example
 hugepage-mmap
 hugepage-shm
 ihex2fw
-ikconfig.h*
 inat-tables.c
 initramfs_list
 int16.c
diff --git a/kernel/Makefile b/kernel/Makefile
index eb26e12c6c2a..eaee9de224bd 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -115,8 +115,6 @@ obj-$(CONFIG_HAS_IOMEM) += memremap.o
 
 $(obj)/configs.o: $(obj)/config_data.h
 
-# config_data.h contains the same information as ikconfig.h but gzipped.
-# Info from config_data can be extracted from /proc/config*
 targets += config_data.gz
 $(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE
 	$(call if_changed,gzip)