10 files changed, 94 insertions, 62 deletions

diff --git a/meta/classes/kernel-devicetree.bbclass b/meta/classes/kernel-devicetree.bbclass
index 6e08be4b70..4f80cc62eb 100644
--- a/meta/classes/kernel-devicetree.bbclass
+++ b/meta/classes/kernel-devicetree.bbclass
@@ -1,10 +1,10 @@
 # Support for device tree generation
 PACKAGES_append = " \
-    kernel-devicetree \
-    ${@['kernel-image-zimage-bundle', ''][d.getVar('KERNEL_DEVICETREE_BUNDLE') != '1']} \
+    ${KERNEL_PACKAGE_NAME}-devicetree \
+    ${@[d.getVar('KERNEL_PACKAGE_NAME') + '-image-zimage-bundle', ''][d.getVar('KERNEL_DEVICETREE_BUNDLE') != '1']} \
 "
-FILES_kernel-devicetree = "/${KERNEL_IMAGEDEST}/*.dtb /${KERNEL_IMAGEDEST}/*.dtbo"
-FILES_kernel-image-zimage-bundle = "/${KERNEL_IMAGEDEST}/zImage-*.dtb.bin"
+FILES_${KERNEL_PACKAGE_NAME}-devicetree = "/${KERNEL_IMAGEDEST}/*.dtb /${KERNEL_IMAGEDEST}/*.dtbo"
+FILES_${KERNEL_PACKAGE_NAME}-image-zimage-bundle = "/${KERNEL_IMAGEDEST}/zImage-*.dtb.bin"
 
 # Generate kernel+devicetree bundle
 KERNEL_DEVICETREE_BUNDLE ?= "0"
diff --git a/meta/classes/kernel-module-split.bbclass b/meta/classes/kernel-module-split.bbclass
index 1035525dac..73c7f18c78 100644
--- a/meta/classes/kernel-module-split.bbclass
+++ b/meta/classes/kernel-module-split.bbclass
@@ -30,7 +30,7 @@ do_install_append() {
 
 PACKAGESPLITFUNCS_prepend = "split_kernel_module_packages "
 
-KERNEL_MODULES_META_PACKAGE ?= "kernel-modules"
+KERNEL_MODULES_META_PACKAGE ?= "${@ d.getVar("KERNEL_PACKAGE_NAME", True) or "kernel" }-modules"
 
 KERNEL_MODULE_PACKAGE_PREFIX ?= ""
 KERNEL_MODULE_PACKAGE_SUFFIX ?= "-${KERNEL_VERSION}"
@@ -129,16 +129,19 @@ python split_kernel_module_packages () {
            postfix = format.split('%s')[1]
            d.setVar('RPROVIDES_' + pkg, pkg.replace(postfix, ''))
 
+    kernel_package_name = d.getVar("KERNEL_PACKAGE_NAME", True) or "kernel"
+    kernel_version = d.getVar("KERNEL_VERSION", True)
+
     module_regex = '^(.*)\.k?o$'
 
     module_pattern_prefix = d.getVar('KERNEL_MODULE_PACKAGE_PREFIX')
     module_pattern_suffix = d.getVar('KERNEL_MODULE_PACKAGE_SUFFIX')
-    module_pattern = module_pattern_prefix + 'kernel-module-%s' + module_pattern_suffix
+    module_pattern = module_pattern_prefix + kernel_package_name + '-module-%s' + module_pattern_suffix
 
     postinst = d.getVar('pkg_postinst_modules')
     postrm = d.getVar('pkg_postrm_modules')
 
-    modules = do_split_packages(d, root='${nonarch_base_libdir}/modules', file_regex=module_regex, output_pattern=module_pattern, description='%s kernel module', postinst=postinst, postrm=postrm, recursive=True, hook=frob_metadata, extra_depends='kernel-%s' % (d.getVar("KERNEL_VERSION")))
+    modules = do_split_packages(d, root='${nonarch_base_libdir}/modules', file_regex=module_regex, output_pattern=module_pattern, description='%s kernel module', postinst=postinst, postrm=postrm, recursive=True, hook=frob_metadata, extra_depends='%s-%s' % (kernel_package_name, kernel_version))
     if modules:
         metapkg = d.getVar('KERNEL_MODULES_META_PACKAGE')
         d.appendVar('RDEPENDS_' + metapkg, ' '+' '.join(modules))
diff --git a/meta/classes/kernel.bbclass b/meta/classes/kernel.bbclass
index e7eda83bd0..f7b612f84f 100644
--- a/meta/classes/kernel.bbclass
+++ b/meta/classes/kernel.bbclass
@@ -1,6 +1,9 @@
 inherit linux-kernel-base kernel-module-split
 
-PROVIDES += "virtual/kernel"
+KERNEL_PACKAGE_NAME ??= "kernel"
+KERNEL_DEPLOYSUBDIR ??= "${@ "" if (d.getVar("KERNEL_PACKAGE_NAME", True) == "kernel") else d.getVar("KERNEL_PACKAGE_NAME", True) }"
+
+PROVIDES += "${@ "virtual/kernel" if (d.getVar("KERNEL_PACKAGE_NAME", True) == "kernel") else "" }"
 DEPENDS += "virtual/${TARGET_PREFIX}binutils virtual/${TARGET_PREFIX}gcc kmod-native bc-native lzop-native"
 PACKAGE_WRITE_DEPS += "depmodwrapper-cross"
 
@@ -34,11 +37,32 @@ KERNEL_VERSION_PKG_NAME = "${@legitimize_package_name(d.getVar('KERNEL_VERSION')
 KERNEL_VERSION_PKG_NAME[vardepvalue] = "${LINUX_VERSION}"
 
 python __anonymous () {
+    pn = d.getVar("PN", True)
+    kpn = d.getVar("KERNEL_PACKAGE_NAME", True)
+
+    # XXX Remove this after bug 11905 is resolved
+    #  FILES_${KERNEL_PACKAGE_NAME}-dev doesn't expand correctly
+    if kpn == pn:
+        bb.warn("Some packages (E.g. *-dev) might be missing due to "
+                "bug 11905 (variable KERNEL_PACKAGE_NAME == PN)")
+
+    # The default kernel recipe builds in a shared location defined by
+    # bitbake/distro confs: STAGING_KERNEL_DIR and STAGING_KERNEL_BUILDDIR.
+    # Set these variables to directories under ${WORKDIR} in alternate
+    # kernel recipes (I.e. where KERNEL_PACKAGE_NAME != kernel) so that they
+    # may build in parallel with the default kernel without clobbering.
+    if kpn != "kernel":
+        workdir = d.getVar("WORKDIR", True)
+        sourceDir = os.path.join(workdir, 'kernel-source')
+        artifactsDir = os.path.join(workdir, 'kernel-build-artifacts')
+        d.setVar("STAGING_KERNEL_DIR", sourceDir)
+        d.setVar("STAGING_KERNEL_BUILDDIR", artifactsDir)
 
     # Merge KERNEL_IMAGETYPE and KERNEL_ALT_IMAGETYPE into KERNEL_IMAGETYPES
     type = d.getVar('KERNEL_IMAGETYPE') or ""
     alttype = d.getVar('KERNEL_ALT_IMAGETYPE') or ""
     types = d.getVar('KERNEL_IMAGETYPES') or ""
+    kname = d.getVar('KERNEL_PACKAGE_NAME', True) or "kernel"
     if type not in types.split():
         types = (type + ' ' + types).strip()
     if alttype not in types.split():
@@ -55,15 +79,15 @@ python __anonymous () {
         typelower = type.lower()
         imagedest = d.getVar('KERNEL_IMAGEDEST')
 
-        d.appendVar('PACKAGES', ' ' + 'kernel-image-' + typelower)
+        d.appendVar('PACKAGES', ' %s-image-%s' % (kname, typelower))
 
-        d.setVar('FILES_kernel-image-' + typelower, '/' + imagedest + '/' + type + '-${KERNEL_VERSION_NAME}' + ' /' + imagedest + '/' + type)
+        d.setVar('FILES_' + kname + '-image-' + typelower, '/' + imagedest + '/' + type + '-${KERNEL_VERSION_NAME}' + ' /' + imagedest + '/' + type)
 
-        d.appendVar('RDEPENDS_kernel-image', ' ' + 'kernel-image-' + typelower)
+        d.appendVar('RDEPENDS_%s-image' % kname, ' %s-image-%s' % (kname, typelower))
 
-        d.setVar('PKG_kernel-image-' + typelower, 'kernel-image-' + typelower + '-${KERNEL_VERSION_PKG_NAME}')
+        d.setVar('PKG_%s-image-%s' % (kname,typelower), '%s-image-%s-${KERNEL_VERSION_PKG_NAME}' % (kname, typelower))
 
-        d.setVar('ALLOW_EMPTY_kernel-image-' + typelower, '1')
+        d.setVar('ALLOW_EMPTY_%s-image-%s' % (kname, typelower), '1')
 
     image = d.getVar('INITRAMFS_IMAGE')
     if image:
@@ -121,9 +145,9 @@ base_do_unpack_append () {
 
 inherit kernel-arch deploy
 
-PACKAGES_DYNAMIC += "^kernel-module-.*"
-PACKAGES_DYNAMIC += "^kernel-image-.*"
-PACKAGES_DYNAMIC += "^kernel-firmware-.*"
+PACKAGES_DYNAMIC += "^${KERNEL_PACKAGE_NAME}-module-.*"
+PACKAGES_DYNAMIC += "^${KERNEL_PACKAGE_NAME}-image-.*"
+PACKAGES_DYNAMIC += "^${KERNEL_PACKAGE_NAME}-firmware-.*"
 
 export OS = "${TARGET_OS}"
 export CROSS_COMPILE = "${TARGET_PREFIX}"
@@ -339,7 +363,9 @@ kernel_do_install() {
         install -d ${D}/boot
         for type in ${KERNEL_IMAGETYPES} ; do
                 install -m 0644 ${KERNEL_OUTPUT_DIR}/${type} ${D}/${KERNEL_IMAGEDEST}/${type}-${KERNEL_VERSION}
-                ln -sf ${type}-${KERNEL_VERSION} ${D}/${KERNEL_IMAGEDEST}/${type}
+                if [ "${KERNEL_PACKAGE_NAME}" == "kernel" ]; then
+                        ln -sf ${type}-${KERNEL_VERSION} ${D}/${KERNEL_IMAGEDEST}/${type}
+                fi
         done
         install -m 0644 System.map ${D}/boot/System.map-${KERNEL_VERSION}
         install -m 0644 .config ${D}/boot/config-${KERNEL_VERSION}
@@ -393,9 +419,9 @@ do_shared_workdir_setscene () {
 
 emit_depmod_pkgdata() {
         # Stash data for depmod
-        install -d ${PKGDESTWORK}/kernel-depmod/
-        echo "${KERNEL_VERSION}" > ${PKGDESTWORK}/kernel-depmod/kernel-abiversion
-        cp ${B}/System.map ${PKGDESTWORK}/kernel-depmod/System.map-${KERNEL_VERSION}
+        install -d ${PKGDESTWORK}/${KERNEL_PACKAGE_NAME}-depmod/
+        echo "${KERNEL_VERSION}" > ${PKGDESTWORK}/${KERNEL_PACKAGE_NAME}-depmod/${KERNEL_PACKAGE_NAME}-abiversion
+        cp ${B}/System.map ${PKGDESTWORK}/${KERNEL_PACKAGE_NAME}-depmod/System.map-${KERNEL_VERSION}
 }
 
 PACKAGEFUNCS += "emit_depmod_pkgdata"
@@ -411,7 +437,7 @@ do_shared_workdir () {
         # Store the kernel version in sysroots for module-base.bbclass
         #
 
-        echo "${KERNEL_VERSION}" > $kerneldir/kernel-abiversion
+        echo "${KERNEL_VERSION}" > $kerneldir/${KERNEL_PACKAGE_NAME}-abiversion
 
         # Copy files required for module builds
         cp System.map $kerneldir/System.map-${KERNEL_VERSION}
@@ -509,28 +535,28 @@ EXPORT_FUNCTIONS do_compile do_install do_configure
 
 # kernel-base becomes kernel-${KERNEL_VERSION}
 # kernel-image becomes kernel-image-${KERNEL_VERSION}
-PACKAGES = "kernel kernel-base kernel-vmlinux kernel-image kernel-dev kernel-modules"
+PACKAGES = "${KERNEL_PACKAGE_NAME} ${KERNEL_PACKAGE_NAME}-base ${KERNEL_PACKAGE_NAME}-vmlinux ${KERNEL_PACKAGE_NAME}-image ${KERNEL_PACKAGE_NAME}-dev ${KERNEL_PACKAGE_NAME}-modules"
 FILES_${PN} = ""
-FILES_kernel-base = "${nonarch_base_libdir}/modules/${KERNEL_VERSION}/modules.order ${nonarch_base_libdir}/modules/${KERNEL_VERSION}/modules.builtin"
-FILES_kernel-image = ""
-FILES_kernel-dev = "/boot/System.map* /boot/Module.symvers* /boot/config* ${KERNEL_SRC_PATH} ${nonarch_base_libdir}/modules/${KERNEL_VERSION}/build"
-FILES_kernel-vmlinux = "/boot/vmlinux-${KERNEL_VERSION_NAME}"
-FILES_kernel-modules = ""
-RDEPENDS_kernel = "kernel-base"
+FILES_${KERNEL_PACKAGE_NAME}-base = "${nonarch_base_libdir}/modules/${KERNEL_VERSION}/modules.order ${nonarch_base_libdir}/modules/${KERNEL_VERSION}/modules.builtin"
+FILES_${KERNEL_PACKAGE_NAME}-image = ""
+FILES_${KERNEL_PACKAGE_NAME}-dev = "/boot/System.map* /boot/Module.symvers* /boot/config* ${KERNEL_SRC_PATH} ${nonarch_base_libdir}/modules/${KERNEL_VERSION}/build"
+FILES_${KERNEL_PACKAGE_NAME}-vmlinux = "/boot/vmlinux-${KERNEL_VERSION_NAME}"
+FILES_${KERNEL_PACKAGE_NAME}-modules = ""
+RDEPENDS_${KERNEL_PACKAGE_NAME} = "${KERNEL_PACKAGE_NAME}-base"
 # Allow machines to override this dependency if kernel image files are
 # not wanted in images as standard
-RDEPENDS_kernel-base ?= "kernel-image"
-PKG_kernel-image = "kernel-image-${@legitimize_package_name('${KERNEL_VERSION}')}"
-RDEPENDS_kernel-image += "${@base_conditional('KERNEL_IMAGETYPE', 'vmlinux', 'kernel-vmlinux', '', d)}"
-PKG_kernel-base = "kernel-${@legitimize_package_name('${KERNEL_VERSION}')}"
-RPROVIDES_kernel-base += "kernel-${KERNEL_VERSION}"
-ALLOW_EMPTY_kernel = "1"
-ALLOW_EMPTY_kernel-base = "1"
-ALLOW_EMPTY_kernel-image = "1"
-ALLOW_EMPTY_kernel-modules = "1"
-DESCRIPTION_kernel-modules = "Kernel modules meta package"
-
-pkg_postinst_kernel-base () {
+RDEPENDS_${KERNEL_PACKAGE_NAME}-base ?= "${KERNEL_PACKAGE_NAME}-image"
+PKG_${KERNEL_PACKAGE_NAME}-image = "${KERNEL_PACKAGE_NAME}-image-${@legitimize_package_name('${KERNEL_VERSION}')}"
+RDEPENDS_${KERNEL_PACKAGE_NAME}-image += "${@base_conditional('KERNEL_IMAGETYPE', 'vmlinux', '${KERNEL_PACKAGE_NAME}-vmlinux', '', d)}"
+PKG_${KERNEL_PACKAGE_NAME}-base = "${KERNEL_PACKAGE_NAME}-${@legitimize_package_name('${KERNEL_VERSION}')}"
+RPROVIDES_${KERNEL_PACKAGE_NAME}-base += "${KERNEL_PACKAGE_NAME}-${KERNEL_VERSION}"
+ALLOW_EMPTY_${KERNEL_PACKAGE_NAME} = "1"
+ALLOW_EMPTY_${KERNEL_PACKAGE_NAME}-base = "1"
+ALLOW_EMPTY_${KERNEL_PACKAGE_NAME}-image = "1"
+ALLOW_EMPTY_${KERNEL_PACKAGE_NAME}-modules = "1"
+DESCRIPTION_${KERNEL_PACKAGE_NAME}-modules = "Kernel modules meta package"
+
+pkg_postinst_${KERNEL_PACKAGE_NAME}-base () {
         if [ ! -e "$D/lib/modules/${KERNEL_VERSION}" ]; then
                 mkdir -p $D/lib/modules/${KERNEL_VERSION}
         fi
@@ -544,7 +570,7 @@ pkg_postinst_kernel-base () {
 PACKAGESPLITFUNCS_prepend = "split_kernel_packages "
 
 python split_kernel_packages () {
-    do_split_packages(d, root='${nonarch_base_libdir}/firmware', file_regex='^(.*)\.(bin|fw|cis|csp|dsp)$', output_pattern='kernel-firmware-%s', description='Firmware for %s', recursive=True, extra_depends='')
+    do_split_packages(d, root='${nonarch_base_libdir}/firmware', file_regex='^(.*)\.(bin|fw|cis|csp|dsp)$', output_pattern='${KERNEL_PACKAGE_NAME}-firmware-%s', description='Firmware for %s', recursive=True, extra_depends='')
 }
 
 # Many scripts want to look in arch/$arch/boot for the bootable
@@ -635,21 +661,27 @@ MODULE_TARBALL_SYMLINK_NAME ?= "modules-${MACHINE}.tgz"
 MODULE_TARBALL_DEPLOY ?= "1"
 
 kernel_do_deploy() {
+        deployDir="${DEPLOYDIR}"
+        if [ -n "${KERNEL_DEPLOYSUBDIR}" ]; then
+                deployDir="${DEPLOYDIR}/${KERNEL_DEPLOYSUBDIR}"
+                mkdir "$deployDir"
+        fi
+
         for type in ${KERNEL_IMAGETYPES} ; do
                 base_name=${type}-${KERNEL_IMAGE_BASE_NAME}
-                install -m 0644 ${KERNEL_OUTPUT_DIR}/${type} ${DEPLOYDIR}/${base_name}.bin
+                install -m 0644 ${KERNEL_OUTPUT_DIR}/${type} $deployDir/${base_name}.bin
         done
         if [ ${MODULE_TARBALL_DEPLOY} = "1" ] && (grep -q -i -e '^CONFIG_MODULES=y$' .config); then
                 mkdir -p ${D}/lib
-                tar -cvzf ${DEPLOYDIR}/${MODULE_TARBALL_BASE_NAME} -C ${D} lib
-                ln -sf ${MODULE_TARBALL_BASE_NAME} ${DEPLOYDIR}/${MODULE_TARBALL_SYMLINK_NAME}
+                tar -cvzf $deployDir/${MODULE_TARBALL_BASE_NAME} -C ${D} lib
+                ln -sf ${MODULE_TARBALL_BASE_NAME} $deployDir/${MODULE_TARBALL_SYMLINK_NAME}
         fi
 
         for type in ${KERNEL_IMAGETYPES} ; do
                 base_name=${type}-${KERNEL_IMAGE_BASE_NAME}
                 symlink_name=${type}-${KERNEL_IMAGE_SYMLINK_NAME}
-                ln -sf ${base_name}.bin ${DEPLOYDIR}/${symlink_name}.bin
-                ln -sf ${base_name}.bin ${DEPLOYDIR}/${type}
+                ln -sf ${base_name}.bin $deployDir/${symlink_name}.bin
+                ln -sf ${base_name}.bin $deployDir/${type}
         done
 
         cd ${B}
@@ -659,8 +691,8 @@ kernel_do_deploy() {
                         echo "Copying deploy ${type} kernel-initramfs image and setting up links..."
                         initramfs_base_name=${type}-${INITRAMFS_BASE_NAME}
                         initramfs_symlink_name=${type}-initramfs-${MACHINE}
-                        install -m 0644 ${KERNEL_OUTPUT_DIR}/${type}.initramfs ${DEPLOYDIR}/${initramfs_base_name}.bin
-                        ln -sf ${initramfs_base_name}.bin ${DEPLOYDIR}/${initramfs_symlink_name}.bin
+                        install -m 0644 ${KERNEL_OUTPUT_DIR}/${type}.initramfs $deployDir/${initramfs_base_name}.bin
+                        ln -sf ${initramfs_base_name}.bin $deployDir/${initramfs_symlink_name}.bin
                 fi
         done
 }
diff --git a/meta/conf/documentation.conf b/meta/conf/documentation.conf
index 081e726d4b..995b60e158 100644
--- a/meta/conf/documentation.conf
+++ b/meta/conf/documentation.conf
@@ -247,6 +247,7 @@ KERNEL_IMAGETYPE[doc] = "The type of kernel to build for a device, usually set b
 KERNEL_IMAGETYPES[doc] = "The list of types of kernel to build for a device, usually set by the machine configuration files and defaults to KERNEL_IMAGETYPE."
 KERNEL_MODULE_AUTOLOAD[doc] = "Lists kernel modules that need to be auto-loaded during boot"
 KERNEL_MODULE_PROBECONF[doc] = "Lists kernel modules for which the build system expects to find module_conf_* values that specify configuration for each of the modules"
+KERNEL_PACKAGE_NAME[doc] = "Name prefix for kernel packages. Defaults to 'kernel'."
 KERNEL_PATH[doc] = "The location of the kernel sources. This variable is set to the value of the STAGING_KERNEL_DIR within the module class (module.bbclass)."
 KERNEL_SRC[doc] = "The location of the kernel sources. This variable is set to the value of the STAGING_KERNEL_DIR within the module class (module.bbclass)."
 KFEATURE_DESCRIPTION[doc] = "Provides a short description of a configuration fragment. You use this variable in the .scc file that describes a configuration fragment file."
diff --git a/meta/recipes-kernel/kmod/depmodwrapper-cross_1.0.bb b/meta/recipes-kernel/kmod/depmodwrapper-cross_1.0.bb
index 68d3f84c0b..48f012918a 100644
--- a/meta/recipes-kernel/kmod/depmodwrapper-cross_1.0.bb
+++ b/meta/recipes-kernel/kmod/depmodwrapper-cross_1.0.bb
@@ -23,17 +23,13 @@ if [ "\$1" != "-a" -o "\$2" != "-b" ]; then
     echo "Usage: depmodwrapper -a -b rootfs KERNEL_VERSION" >&2
     exit 1
 fi
-if [ ! -r ${PKGDATA_DIR}/kernel-depmod/kernel-abiversion ]; then
-    echo "Unable to read: ${PKGDATA_DIR}/kernel-depmod/kernel-abiversion" >&2
-else
-    kernelabi=\$(cat ${PKGDATA_DIR}/kernel-depmod/kernel-abiversion)
-    if [ "\$kernelabi" != "\$4" ]; then
-        echo "Error: Kernel version \$4 does not match kernel-abiversion (\$kernelabi)" >&2
-        exit 1
-    fi
+
+kernelabi=""
+if [ -r "${PKGDATA_DIR}/kernel-depmod/kernel-abiversion" ]; then
+    kernelabi=\$(cat "${PKGDATA_DIR}/kernel-depmod/kernel-abiversion")
 fi
 
-if [ ! -r ${PKGDATA_DIR}/kernel-depmod/System.map-\$4 ]; then
+if [ ! -r ${PKGDATA_DIR}/kernel-depmod/System.map-\$4 ] || [ "\$kernelabi" != "\$4" ]; then
     echo "Unable to read: ${PKGDATA_DIR}/kernel-depmod/System.map-\$4" >&2
     exec env depmod "\$1" "\$2" "\$3" "\$4"
 else
diff --git a/meta/recipes-kernel/linux/linux-yocto-rt_4.10.bb b/meta/recipes-kernel/linux/linux-yocto-rt_4.10.bb
index fd31bf986c..40d6e4ac23 100644
--- a/meta/recipes-kernel/linux/linux-yocto-rt_4.10.bb
+++ b/meta/recipes-kernel/linux/linux-yocto-rt_4.10.bb
@@ -7,7 +7,7 @@ require recipes-kernel/linux/linux-yocto.inc
 # to build multiple virtual/kernel providers, e.g. as dependency of
 # core-image-rt-sdk, core-image-rt.
 python () {
-    if d.getVar("PREFERRED_PROVIDER_virtual/kernel") != "linux-yocto-rt":
+    if d.getVar("KERNEL_PACKAGE_NAME", True) == "kernel" and d.getVar("PREFERRED_PROVIDER_virtual/kernel") != "linux-yocto-rt":
         raise bb.parse.SkipPackage("Set PREFERRED_PROVIDER_virtual/kernel to linux-yocto-rt to enable it")
 }
 
diff --git a/meta/recipes-kernel/linux/linux-yocto-rt_4.12.bb b/meta/recipes-kernel/linux/linux-yocto-rt_4.12.bb
index 25f3963c74..ed65f77a91 100644
--- a/meta/recipes-kernel/linux/linux-yocto-rt_4.12.bb
+++ b/meta/recipes-kernel/linux/linux-yocto-rt_4.12.bb
@@ -7,7 +7,7 @@ require recipes-kernel/linux/linux-yocto.inc
 # to build multiple virtual/kernel providers, e.g. as dependency of
 # core-image-rt-sdk, core-image-rt.
 python () {
-    if d.getVar("PREFERRED_PROVIDER_virtual/kernel") != "linux-yocto-rt":
+    if d.getVar("KERNEL_PACKAGE_NAME", True) == "kernel" and d.getVar("PREFERRED_PROVIDER_virtual/kernel") != "linux-yocto-rt":
         raise bb.parse.SkipPackage("Set PREFERRED_PROVIDER_virtual/kernel to linux-yocto-rt to enable it")
 }
 
diff --git a/meta/recipes-kernel/linux/linux-yocto-rt_4.4.bb b/meta/recipes-kernel/linux/linux-yocto-rt_4.4.bb
index c1cbf35a25..e1547e9960 100644
--- a/meta/recipes-kernel/linux/linux-yocto-rt_4.4.bb
+++ b/meta/recipes-kernel/linux/linux-yocto-rt_4.4.bb
@@ -7,7 +7,7 @@ require recipes-kernel/linux/linux-yocto.inc
 # to build multiple virtual/kernel providers, e.g. as dependency of
 # core-image-rt-sdk, core-image-rt.
 python () {
-    if d.getVar("PREFERRED_PROVIDER_virtual/kernel") != "linux-yocto-rt":
+    if d.getVar("KERNEL_PACKAGE_NAME", True) == "kernel" and d.getVar("PREFERRED_PROVIDER_virtual/kernel") != "linux-yocto-rt":
         raise bb.parse.SkipPackage("Set PREFERRED_PROVIDER_virtual/kernel to linux-yocto-rt to enable it")
 }
 
diff --git a/meta/recipes-kernel/linux/linux-yocto-rt_4.9.bb b/meta/recipes-kernel/linux/linux-yocto-rt_4.9.bb
index d225339c14..fa25629861 100644
--- a/meta/recipes-kernel/linux/linux-yocto-rt_4.9.bb
+++ b/meta/recipes-kernel/linux/linux-yocto-rt_4.9.bb
@@ -7,7 +7,7 @@ require recipes-kernel/linux/linux-yocto.inc
 # to build multiple virtual/kernel providers, e.g. as dependency of
 # core-image-rt-sdk, core-image-rt.
 python () {
-    if d.getVar("PREFERRED_PROVIDER_virtual/kernel") != "linux-yocto-rt":
+    if d.getVar("KERNEL_PACKAGE_NAME", True) == "kernel" and d.getVar("PREFERRED_PROVIDER_virtual/kernel") != "linux-yocto-rt":
         raise bb.parse.SkipPackage("Set PREFERRED_PROVIDER_virtual/kernel to linux-yocto-rt to enable it")
 }
 
diff --git a/meta/recipes-kernel/linux/linux-yocto.inc b/meta/recipes-kernel/linux/linux-yocto.inc
index 9c1f61be75..8a70eb5018 100644
--- a/meta/recipes-kernel/linux/linux-yocto.inc
+++ b/meta/recipes-kernel/linux/linux-yocto.inc
@@ -12,7 +12,7 @@ INC_PR = "r4"
 # PREFERRED_PROVIDER for virtual/kernel. This avoids network access required
 # by the use of AUTOREV SRCREVs, which are the default for this recipe.
 python () {
-    if d.getVar("PREFERRED_PROVIDER_virtual/kernel") != d.getVar("PN"):
+    if d.getVar("KERNEL_PACKAGE_NAME", True) == "kernel" and d.getVar("PREFERRED_PROVIDER_virtual/kernel", True) != d.getVar("PN", True):
         d.delVar("BB_DONT_CACHE")
         raise bb.parse.SkipPackage("Set PREFERRED_PROVIDER_virtual/kernel to %s to enable it" % (d.getVar("PN")))
 }