diff --git a/config/kernel.m4 b/config/kernel.m4
index df62b2f258..708957e35a 100644
--- a/config/kernel.m4
+++ b/config/kernel.m4
@@ -6,37 +6,24 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
 	dnl # KERNELMAKE_PARAMS="V=1"	# Enable verbose module build
 	KERNELMAKE_PARAMS=
 
-	dnl # Kernel build cpp flags
+	# FIXME: Quiet warnings not covered by the gcc-* patches.  We should
+	# FIXME: consider removing this as soon as we reasonably can
+	KERNELCPPFLAGS="$KERNELCPPFLAGS -Wall -Wstrict-prototypes -Werror "
+	KERNELCPPFLAGS="$KERNELCPPFLAGS -Wno-switch -Wno-unused -Wno-missing-braces "
+	KERNELCPPFLAGS="$KERNELCPPFLAGS -Wno-unknown-pragmas -Wno-parentheses "
+	KERNELCPPFLAGS="$KERNELCPPFLAGS -Wno-uninitialized -fno-strict-aliasing "
+
 	KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL "
-	KERNELCPPFLAGS="$KERNELCPPFLAGS -Wno-unknown-pragmas "
+	KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\" "
+
 	KERNELCPPFLAGS="$KERNELCPPFLAGS -I$splsrc -I$splsrc/include -I$TOPDIR"
 
-	dnl # Required for pread() functionality an other GNU goodness
-	HOSTCFLAGS="$HOSTCFLAGS -ggdb -O2 -std=c99 "
-	HOSTCFLAGS="$HOSTCFLAGS -D_GNU_SOURCE -D__EXTENSIONS__ "
-
-	dnl # XXX: Quiet warnings not covered by the gcc-* patches
-	dnl # XXX: Remove once all the warnings are resolved
-	HOSTCFLAGS="$HOSTCFLAGS -Wno-switch -Wno-unused -Wno-missing-braces "
-	HOSTCFLAGS="$HOSTCFLAGS -Wno-unknown-pragmas -Wno-parentheses "
-	HOSTCFLAGS="$HOSTCFLAGS -Wno-uninitialized -fno-strict-aliasing "
-
-	dnl # Expected defines not covered by zfs_config.h or spl_config.h
-	HOSTCFLAGS="$HOSTCFLAGS -DHAVE_SPL -D_POSIX_PTHREAD_SEMANTICS "
-	HOSTCFLAGS="$HOSTCFLAGS -D_FILE_OFFSET_BITS=64 "
-	HOSTCFLAGS="$HOSTCFLAGS -D_LARGEFILE64_SOURCE -D_REENTRANT "
-	HOSTCFLAGS="$HOSTCFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\" "
-
-	dnl # Expected default include path
-	HOSTCFLAGS="$HOSTCFLAGS -I$TOPDIR "
-
 	if test "$kernelbuild" != "$kernelsrc"; then
 		KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$kernelbuild"
 	fi
 
         AC_SUBST(KERNELMAKE_PARAMS)
         AC_SUBST(KERNELCPPFLAGS)
-        AC_SUBST(HOSTCFLAGS)
 
 	ZFS_AC_CONFIG_KERNEL_BIO_ARGS
 ])