Some initramfs bundled code exist in wr-kernel but not compatible with upstream.
1 configure a project
2 check the wr-kernel/recipes-kernel/linux/linux-windriver.inc for:
......
INITRAMFS_BASE_NAME = "${KERNEL_IMAGETYPE}-initramfs-${PV}-${PR}-${MACHINE}-${DATETIME}"
INITRAMFS_BASE_NAME[vardepsexclude] = "DATETIME"
do_bundle_initramfs[depends] += "virtual/kernel:do_install"
......
the exact same code exist in oe-core layer already.