Implement separate function for installing kernel modules.

boards/raspberry-pi2.sh

@@ -93,14 +93,7 @@ build_kernel_armhf() {
 			ARCH=arm \
 			CROSS_COMPILE=$compiler || zerr
 
-		# install kernel modules
-		sudo -E PATH="$PATH" \
-			make \
-				$MAKEOPTS \
-				ARCH=arm \
-				CROSS_COMPILE=$compiler \
-				INSTALL_MOD_PATH=$strapdir \
-					modules_install || zerr
+		install-kernel-mods arm || zerr
 	popd
 
 	clone-git "$rpifirmware" "$R/tmp/kernels/$device_name/${device_name}-firmware"

lib/helpers

@@ -43,6 +43,26 @@ get-kernel-firmware() {
 	clone-git "$linuxfirmware" "$R/tmp/linux-firmware"
 }
 
+install-kernel-mods() {
+	fn install-kernel-mods
+	req=(MAKEOPTS PATH compiler strapdir)
+	ckreq || return 1
+
+	# We need this function to avoid sudo -E calls, which are
+	# forbidden by jenkins.
+	cat <<EOF > install_mods
+#!/bin/sh
+export PATH="${PATH}"
+sudo make \
+	${MAKEOPTS} \
+	ARCH="${1}" \
+	CROSS_COMPILE=${compiler} \
+	INSTALL_MOD_PATH=${strapdir} \
+		modules_install || exit 1
+EOF
+	chroot-script -d install_mods || zerr
+}
+
 clone-git() {
 	fn clone-git "$@"
 	req=(giturl clonepath)