diff --git a/Config.in b/Config.in
index c798510f0c1c32851e0d6aa06fd323154f1a722e..30d7eca4a4bd0d197373c2c1a2dc8d550a8312d7 100644
--- a/Config.in
+++ b/Config.in
@@ -23,7 +23,6 @@ menu "Target Images"
 	choice
 		prompt "ramdisk compression"
 		depends TARGET_ROOTFS_INITRAMFS
-		depends !LINUX_2_6_21
 		depends !LINUX_2_6_25
 		default TARGET_INITRAMFS_COMPRESSION_LZMA if TARGET_ar71xx
 		default TARGET_INITRAMFS_COMPRESSION_NONE
diff --git a/include/image.mk b/include/image.mk
index 990ce8e4003e017a4a19bb3c23a510ce7f20657e..e133f7212c3473372b3106ee4eac2785c97b6621 100644
--- a/include/image.mk
+++ b/include/image.mk
@@ -23,7 +23,7 @@ JFFS2OPTS     :=  --pad --big-endian --squash
 SQUASHFS_OPTS :=  -be
 endif
 
-ifneq ($(CONFIG_LINUX_2_4)$(CONFIG_LINUX_2_6_21)$(CONFIG_LINUX_2_6_25),)
+ifneq ($(CONFIG_LINUX_2_4)$(CONFIG_LINUX_2_6_25),)
 USE_SQUASHFS3 := y
 endif
 
diff --git a/include/kernel-version.mk b/include/kernel-version.mk
index c2faae0d04195585d2c61a8b36382e28a0b2d754..b2810ce75ff389bbb9a52007e03e10a777c559f9 100644
--- a/include/kernel-version.mk
+++ b/include/kernel-version.mk
@@ -8,9 +8,6 @@ LINUX_RELEASE?=1
 ifeq ($(LINUX_VERSION),2.4.37.5)
   LINUX_KERNEL_MD5SUM:=cb221187422acaf6c63a40c646e5e476
 endif
-ifeq ($(LINUX_VERSION),2.6.21.7)
-  LINUX_KERNEL_MD5SUM:=bc15fad1487336d5dcb0945cd039d8ed
-endif
 ifeq ($(LINUX_VERSION),2.6.25.20)
   LINUX_KERNEL_MD5SUM:=0da698edccf03e2235abc2830a495114
 endif
diff --git a/package/mac80211/Makefile b/package/mac80211/Makefile
index f8d8d390f026589823b0196d36003859baa3334d..a9c8687637e57213eae2d7e0197089e5dc3ad0b4 100644
--- a/package/mac80211/Makefile
+++ b/package/mac80211/Makefile
@@ -40,7 +40,7 @@ endef
 define KernelPackage/mac80211
   $(call KernelPackage/mac80211/Default)
   TITLE:=Linux 802.11 Wireless Networking Stack
-  DEPENDS+= +kmod-crypto-core +kmod-crypto-arc4 +kmod-crypto-aes +wireless-tools +iw @!LINUX_2_6_21 @!LINUX_2_6_25
+  DEPENDS+= +kmod-crypto-core +kmod-crypto-arc4 +kmod-crypto-aes +wireless-tools +iw @!LINUX_2_6_25
   FILES:= \
 	$(PKG_BUILD_DIR)/compat/compat.$(LINUX_KMOD_SUFFIX) \
 	$(PKG_BUILD_DIR)/compat/compat_firmware_class.$(LINUX_KMOD_SUFFIX) \
diff --git a/tools/Makefile b/tools/Makefile
index 3d19892100f0b7032cb4745443ae21002bb12cda..8fc2da3d96a4df5ce0de33a3588036cd6074ac1c 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -17,7 +17,7 @@ tools-y += m4 autoconf automake bison pkg-config sed mklibs
 tools-y += sstrip ipkg-utils genext2fs libuuid mtd-utils mkimage
 tools-y += firmware-utils patch-cmdline quilt yaffs2
 tools-$(CONFIG_TARGET_orion) += wrt350nv2-builder upslug2
-ifneq ($(CONFIG_LINUX_2_4)$(CONFIG_LINUX_2_6_21)$(CONFIG_LINUX_2_6_25),)
+ifneq ($(CONFIG_LINUX_2_4)$(CONFIG_LINUX_2_6_25),)
 tools-y += squashfs lzma-old
 else
 ifneq ($(CONFIG_TARGET_ar71xx),)