kernel.bbclass: Stop bundle_initramfs thwarting sstate cache and fix race

The new do_bundle_initramfs task introduced in
609d5a9ab9e58bb1c2bcc2145399fbc8b701b85a defeats using the sstate
cache. The kernel is resurrected from the sstate cache but ends up being
built again since do_bundle_initramfs depends on do_compile.

The task is no longer nostamp to avoid causing unnecessary rebuilds. The
sstate checksum stamps should know when to rebuild.

The task now runs before do_deploy and part of the work has been moved to
do_deploy where it now writes to ${DEPLOYDIR} rather than
${DEPLOY_DIR_IMAGE} so that the files end up in sstate.

The task can also race against do_install since both call into the kernel
build system. This is fixed by making do_bundle_initramfs run after
do_install (which therefore also fixes the problem that
3baa63b4d588c3262254528b406ede265dd117bf was addressing.)

(From OE-Core rev: 55989cb509340bd265d0ce0d8bfe849681be4616)

Signed-off-by: Mike Crowe <mac@mcrowe.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/kernel.bbclass

@@ -134,25 +134,14 @@ do_bundle_initramfs () {
 		echo "There is kernel image bundled with initramfs: ${B}/${KERNEL_OUTPUT}.initramfs"
 		install -m 0644 ${B}/${KERNEL_OUTPUT}.initramfs ${D}/boot/${KERNEL_IMAGETYPE}-initramfs-${MACHINE}.bin
 		echo "${B}/${KERNEL_OUTPUT}.initramfs"
-		cd ${B}
-		# Update deploy directory
-		if [ -e "${KERNEL_OUTPUT}.initramfs" ]; then
-			echo "Copying deploy kernel-initramfs image and setting up links..."
-			initramfs_base_name=${INITRAMFS_BASE_NAME}
-			initramfs_symlink_name=${KERNEL_IMAGETYPE}-initramfs-${MACHINE}
-			install -m 0644 ${KERNEL_OUTPUT}.initramfs ${DEPLOY_DIR_IMAGE}/${initramfs_base_name}.bin
-			cd ${DEPLOY_DIR_IMAGE}
-			ln -sf ${initramfs_base_name}.bin ${initramfs_symlink_name}.bin
-		fi
 	fi
 }
-do_bundle_initramfs[nostamp] = "1"
 
 python do_devshell_prepend () {
     os.environ["LDFLAGS"] = ''
 }
 
-addtask bundle_initramfs after do_compile before do_build
+addtask bundle_initramfs after do_install before do_deploy
 
 kernel_do_compile() {
 	unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS MACHINE
@@ -479,6 +468,17 @@ kernel_do_deploy() {
 	ln -sf ${KERNEL_IMAGE_BASE_NAME}.bin ${DEPLOYDIR}/${KERNEL_IMAGETYPE}
 
 	cp ${COREBASE}/meta/files/deploydir_readme.txt ${DEPLOYDIR}/README_-_DO_NOT_DELETE_FILES_IN_THIS_DIRECTORY.txt
+
+	cd ${B}
+	# Update deploy directory
+	if [ -e "${KERNEL_OUTPUT}.initramfs" ]; then
+		echo "Copying deploy kernel-initramfs image and setting up links..."
+		initramfs_base_name=${INITRAMFS_BASE_NAME}
+		initramfs_symlink_name=${KERNEL_IMAGETYPE}-initramfs-${MACHINE}
+		install -m 0644 ${KERNEL_OUTPUT}.initramfs ${DEPLOYDIR}/${initramfs_base_name}.bin
+		cd ${DEPLOYDIR}
+		ln -sf ${initramfs_base_name}.bin ${initramfs_symlink_name}.bin
+	fi
 }
 do_deploy[dirs] = "${DEPLOYDIR} ${B}"
 do_deploy[prefuncs] += "package_get_auto_pr"