[OE-core] [PATCH v4] kernel: Add support for multiple kernel packages
Wold, Saul
saul.wold at intel.com
Wed Jul 19 15:56:47 UTC 2017
On Tue, 2017-07-18 at 08:34 -0500, Haris Okanovic wrote:
>
> On 07/17/2017 03:31 PM, Wold, Saul wrote:
> >
> > On Wed, 2017-07-05 at 12:33 -0500, Haris Okanovic wrote:
> > >
> > > Some distros may want to provide alternate kernel "flavors" via
> > > feeds
> > > or
> > > within bootable images. For example, readily available builds
> > > which
> > > provide certain diagnostic features can enable developers and
> > > testers
> > > to
> > > more quickly resolve issues by avoiding lengthy kernel builds.
> > >
> > > This change allows for building multiple flavors of the kernel
> > > and
> > > module packages by templatizing kernel package names via a new
> > > KERNEL_PACKAGE_NAME variable in kernel.bbclass. It defaults to
> > > the
> > > old
> > > name of "kernel", but can be overridden by certain recipes
> > > providing
> > > alternate kernel flavors.
> > >
> > > To maintain compatibility, recipes providing alternate kernel
> > > flavors
> > > cannot be the "preferred provider" for virtual/kernel. This is
> > > because
> > > OE puts the preferred provider's build and source at
> > > "tmp-glibc/work-shared/$MACHINE/kernel-build-artifacts/" and
> > > "tmp-glibc/work-shared/$MACHINE/kernel-source/" instead of
> > > "tmp-glibc/work/*/$PN/" like other recipes. Therefore, recipes
> > > using
> > > the
> > > default KERNEL_PACKAGE_NAME="kernel" follows the old semantics --
> > > build
> > > in the old location and may be preferred provider -- while
> > > recipes
> > > using
> > > all other KERNEL_PACKAGE_NAME's build from the normal WORKDIR and
> > > don't
> > > provide "virtual/kernel".
> > >
> > > Testing:
> > > 1. Prepended `KERNEL_PACKAGE_NAME = "tiny-linux"` to
> > > linux-yocto-tiny_4.9.bb so that it may build alongside
> > > the main kernel.
> > > 2. `bitbake linux-yocto linux-yocto-tiny` to build both kernel
> > > flavors.
> > > 3. Verified image and modules IPKs exist for both:
> > > tmp-glibc/deploy/ipk/qemux86/kernel-* for linux-yocto
> > > tmp-glibc/deploy/ipk/qemux86/tiny-linux* for linux-yocto-
> > > tiny
> > > 4. Verified linux-yocto is the "preferred provider", and was
> > > built
> > > in
> > > shared directory: tmp-glibc/work-shared/qemux86/kernel-*
> > > 5. Appended `CORE_IMAGE_BASE_INSTALL += "tiny-linux"` to
> > > core-image-base.bb to include both kernel flavors.
> > > 6. `bitbake core-image-base` to build an image.
> > > 7. Verified image contains two bzImage's under /boot/, with
> > > "yocto-standard" selected to boot via symlink.
> > >
> > > Discussion thread:
> > > http://lists.openembedded.org/pipermail/openembedded-core/2015-De
> > > cemb
> > > er/thread.html#114122
> > >
> > > Signed-off-by: Ioan-Adrian Ratiu <adrian.ratiu at ni.com>
> > > Signed-off-by: Gratian Crisan <gratian.crisan at ni.com>
> > > Signed-off-by: Haris Okanovic <haris.okanovic at ni.com>
> > > Coauthored-by: Gratian Crisan <gratian.crisan at ni.com>
> > > Coauthored-by: Haris Okanovic <haris.okanovic at ni.com>
> > > Coauthored-by: Josh Hernstrom <josh.hernstrom at ni.com>
> > > ---
> > > [PATCH v2] Change STAGING_KERNEL_DIR and STAGING_KERNEL_BUILDDIR
> > > to
> > > the
> > > "work" directory in alternate kernel builds, instead of "work-
> > > shared",
> > > so
> > > that the two builds don't clobber each other.
> > >
> > > [PATCH v3] An updated version of this change rebased onto the
> > > current
> > > OE-core master. Changes:
> > > * Remove PREFERRED_PROVIDER check in linux-yocto.inc in
> > > alternate
> > > kernel builds, since alternate kernels aren't the
> > > PREFERRED_PROVIDER for virtual/kernel by definition.
> > > * Remove "virtual/kernel" from PROVIDES in alternate kernel
> > > builds.
> > >
> > > [PATCH v4] Another rebase onto master; no functional change.
> > > Improved description and testing steps.
> >
> > So I finally had a chance to get back to this and test build with
> > it, I
> > saw the following WARNING, which lead to the ERROR:
> >
> > WARNING: Variable key FILES_${PN}-dev (${includedir}
> > ${FILES_SOLIBSDEV}
> > ${libdir}/*.la ${libdir}/*.o ${libdir}/pkgconfig
> > ${datadir}/pkgconfig
> > ${datadir}/aclocal ${base_libdir}/*.o ${libdir}/${BPN}/*.la
> > ${base_libdir}/*.la) replaces original key FILES_linux-yocto-dev
> > (/boot/System.map* /boot/Module.symvers* /boot/config*
> > ${KERNEL_SRC_PATH}
> > ${nonarch_base_libdir}/modules/${KERNEL_VERSION}/build).
> > ERROR: linux-yocto-4.10.17+gitAUTOINC+e92bd55409_6648a34e00-r0
> > do_package: QA Issue: linux-yocto: Files/directories were installed
> > but
> > not shipped in any package:
> > /boot/System.map-4.10.17-yocto-standard
> > /boot/Module.symvers-4.10.17-yocto-standard
> > /boot/config-4.10.17-yocto-standard
> > Please set FILES such that these items are packaged. Alternatively
> > if
> > they are unneeded, avoid installing them or delete them within
> > do_install.
> > linux-yocto: 3 installed and not shipped files. [installed-vs-
> > shipped]
> > ERROR: linux-yocto-4.10.17+gitAUTOINC+e92bd55409_6648a34e00-r0
> > do_package: Fatal QA errors found, failing task.
> > ERROR: linux-yocto-4.10.17+gitAUTOINC+e92bd55409_6648a34e00-r0
> > do_package: Function failed: do_package
> >
> > Something seems to be causing the FILES_linux-yocto-dev info to be
> > overridden, I have not tracked down the culprit yet.
> >
>
> `FILES_linux-yocto-dev` is set to the default value from OE's
> bitbake.conf. `FILES_kernel-dev` on the other hand is set by
> kernel.bbclass; when `KERNEL_PACKAGE_NAME` expands to `kernel`.
>
> I think the real issue here is that QA checks care about
> `FILES_${PN}-dev` at all even though that particular package name
> isn't
> listed in `PACKAGES` variable. I.e. `FILES_${PN}-dev` should be
> disregarded since the `linux-yocto` recipe doesn't create package
> `${PN}-dev`.
>
> Thoughts?
>
It's hard to special case this. After you sent this, I realized what I
did was set the KERNEL_PACKAGE_NAME to linux-yocto and because the
KERNEL_PACKAGE_NAME matched the actual recipe name we got the strange
${PN} interaction, we might be able to add a test to flag that as an
error or warning in the kernel.bbclass.
I am also seeing an issue when I build a 4.9 kernel and then set-up a
4.10 kernel with the kernel-abiversion getting mis-matched from the
depmodwrapper. Have you tested with different versions? I know it
should work with a old kernel/userspace -> new kernel, but not from a
new kernel/userspace -> old kernel.
Sau!
> >
> > Sau!
> >
> > >
> > > ---
> > > meta/classes/kernel-module-split.bbclass | 9 ++--
> > > meta/classes/kernel.bbclass | 85
> > > ++++++++++++++++++---
> > > ----------
> > > meta/conf/documentation.conf | 1 +
> > > meta/recipes-kernel/linux/linux-dtb.inc | 2 +-
> > > meta/recipes-kernel/linux/linux-yocto.inc | 2 +-
> > > 5 files changed, 59 insertions(+), 40 deletions(-)
> > >
> > > diff --git a/meta/classes/kernel-module-split.bbclass
> > > b/meta/classes/kernel-module-split.bbclass
> > > index 1035525dac..9716c5937b 100644
> > > --- a/meta/classes/kernel-module-split.bbclass
> > > +++ b/meta/classes/kernel-module-split.bbclass
> > > @@ -30,7 +30,7 @@ do_install_append() {
> > >
> > > PACKAGESPLITFUNCS_prepend = "split_kernel_module_packages "
> > >
> > > -KERNEL_MODULES_META_PACKAGE ?= "kernel-modules"
> > > +KERNEL_MODULES_META_PACKAGE ?= "${KERNEL_PACKAGE_NAME}-modules"
> > >
> > > KERNEL_MODULE_PACKAGE_PREFIX ?= ""
> > > KERNEL_MODULE_PACKAGE_SUFFIX ?= "-${KERNEL_VERSION}"
> > > @@ -129,16 +129,19 @@ python split_kernel_module_packages () {
> > > postfix = format.split('%s')[1]
> > > d.setVar('RPROVIDES_' + pkg, pkg.replace(postfix,
> > > ''))
> > >
> > > + kernel_package_name = d.getVar("KERNEL_PACKAGE_NAME", True)
> > > + kernel_version = d.getVar("KERNEL_VERSION", True)
> > > +
> > > module_regex = '^(.*)\.k?o$'
> > >
> > > 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 7670c7107a..7fa4509961 100644
> > > --- a/meta/classes/kernel.bbclass
> > > +++ b/meta/classes/kernel.bbclass
> > > @@ -1,6 +1,8 @@
> > > inherit linux-kernel-base kernel-module-split
> > >
> > > -PROVIDES += "virtual/kernel"
> > > +KERNEL_PACKAGE_NAME ??= "kernel"
> > > +
> > > +PROVIDES += "${@ "virtual/kernel" if
> > > (d.getVar("KERNEL_PACKAGE_NAME", True) == "kernel") else "" }"
> > > DEPENDS += "virtual/${TARGET_PREFIX}binutils
> > > virtual/${TARGET_PREFIX}gcc kmod-native bc-native lzop-native"
> > > PACKAGE_WRITE_DEPS += "depmodwrapper-cross virtual/update-
> > > alternatives-native"
> > >
> > > @@ -33,10 +35,23 @@ KERNEL_VERSION_PKG_NAME[vardepvalue] =
> > > "${LINUX_VERSION}"
> > >
> > > python __anonymous () {
> > >
> > > + # 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 ${WORKDIR} in
> > > alternate
> > > + # kernel recipes (I.e. where KERNEL_PACKAGE_NAME != kernel)
> > > so
> > > that they
> > > + # may build in parallel with the default kernel without
> > > clobbering.
> > > + if d.getVar("KERNEL_PACKAGE_NAME", True) != "kernel":
> > > + workdir = d.getVar("WORKDIR", True)
> > > + sourceDir = os.path.join(workdir, 'kernel-source')
> > > + artifactsDir = os.path.join(workdir, 'kernel-build-
> > > artifacts')
> > > + d.setVar("STAGING_KERNEL_DIR", sourceDir)
> > > + d.setVar("STAGING_KERNEL_BUILDDIR", artifactsDir)
> > > +
> > > # Merge KERNEL_IMAGETYPE and KERNEL_ALT_IMAGETYPE into
> > > KERNEL_IMAGETYPES
> > > type = d.getVar('KERNEL_IMAGETYPE') or ""
> > > alttype = d.getVar('KERNEL_ALT_IMAGETYPE') or ""
> > > types = d.getVar('KERNEL_IMAGETYPES') or ""
> > > + kname = d.getVar('KERNEL_PACKAGE_NAME', True) or "kernel"
> > > if type not in types.split():
> > > types = (type + ' ' + types).strip()
> > > if alttype not in types.split():
> > > @@ -53,22 +68,22 @@ python __anonymous () {
> > > typelower = type.lower()
> > > imagedest = d.getVar('KERNEL_IMAGEDEST')
> > >
> > > - d.appendVar('PACKAGES', ' ' + 'kernel-image-' +
> > > typelower)
> > > + d.appendVar('PACKAGES', ' %s-image-%s' % (kname,
> > > typelower))
> > >
> > > - d.setVar('FILES_kernel-image-' + typelower, '/' +
> > > imagedest
> > > + '/' + type + '-${KERNEL_VERSION_NAME}')
> > > + d.setVar('FILES_' + kname + '-image-' + typelower, '/' +
> > > imagedest + '/' + type + '-${KERNEL_VERSION_NAME}')
> > >
> > > - d.appendVar('RDEPENDS_kernel-image', ' ' + 'kernel-
> > > image-' +
> > > typelower)
> > > + d.appendVar('RDEPENDS_%s-image' % kname, ' %s-image-%s'
> > > %
> > > (kname, typelower))
> > >
> > > - d.setVar('PKG_kernel-image-' + typelower, 'kernel-image-
> > > ' +
> > > typelower + '-${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')
> > >
> > > priority = d.getVar('KERNEL_PRIORITY')
> > > postinst = '#!/bin/sh\n' + 'update-alternatives --
> > > install /'
> > > + imagedest + '/' + type + ' ' + type + ' ' + type + '-
> > > ${KERNEL_VERSION_NAME} ' + priority + ' || true' + '\n'
> > > - d.setVar('pkg_postinst_kernel-image-' + typelower,
> > > postinst)
> > > + d.setVar('pkg_postinst_' + kname + '-image-' +
> > > typelower,
> > > postinst)
> > >
> > > postrm = '#!/bin/sh\n' + 'update-alternatives --remove'
> > > + '
> > > ' + type + ' ' + type + '-${KERNEL_VERSION_NAME} || true' + '\n'
> > > - d.setVar('pkg_postrm_kernel-image-' + typelower, postrm)
> > > + d.setVar('pkg_postrm_%s-image-%s' % (kname, typelower),
> > > postrm)
> > >
> > > image = d.getVar('INITRAMFS_IMAGE')
> > > if image:
> > > @@ -126,9 +141,9 @@ 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}"
> > > @@ -371,9 +386,9 @@ 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-${KERNEL_VERSION}
> > > }
> > >
> > > PACKAGEFUNCS += "emit_depmod_pkgdata"
> > > @@ -388,7 +403,7 @@ do_shared_workdir () {
> > > # Store the kernel version in sysroots for module-
> > > base.bbclass
> > > #
> > >
> > > - echo "${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}
> > > @@ -486,28 +501,28 @@ 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-${@legitimize_package_name('${K
> > > ERNE
> > > L_VERSION}')}"
> > > -RDEPENDS_kernel-image += "${@base_conditional('KERNEL_IMAGETYPE'
> > > ,
> > > 'vmlinux', 'kernel-vmlinux', '', d)}"
> > > -PKG_kernel-base = "kernel-${@legitimize_package_name('${KERNEL_V
> > > ERSI
> > > ON}')}"
> > > -RPROVIDES_kernel-base += "kernel-${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('K
> > > ERNE
> > > L_IMAGETYPE', 'vmlinux', '${KERNEL_PACKAGE_NAME}-vmlinux', '',
> > > d)}"
> > > +PKG_${KERNEL_PACKAGE_NAME}-base = "${KERNEL_PACKAGE_NAME}-${@leg
> > > itim
> > > ize_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
> > > @@ -521,7 +536,7 @@ 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
> > > diff --git a/meta/conf/documentation.conf
> > > b/meta/conf/documentation.conf
> > > index 35b9103b4a..e061b98de3 100644
> > > --- a/meta/conf/documentation.conf
> > > +++ b/meta/conf/documentation.conf
> > > @@ -248,6 +248,7 @@ 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/linux/linux-dtb.inc
> > > b/meta/recipes-
> > > kernel/linux/linux-dtb.inc
> > > index 0174c80d85..da6467bf9f 100644
> > > --- a/meta/recipes-kernel/linux/linux-dtb.inc
> > > +++ b/meta/recipes-kernel/linux/linux-dtb.inc
> > > @@ -4,7 +4,7 @@ FILES_kernel-devicetree =
> > > "/${KERNEL_IMAGEDEST}/devicetree*"
> > > PACKAGE_WRITE_DEPS += "virtual/update-alternatives-native"
> > >
> > > python __anonymous () {
> > > - d.appendVar("PACKAGES", " kernel-devicetree")
> > > + d.appendVar("PACKAGES", " ${KERNEL_PACKAGE_NAME}-
> > > devicetree")
> > > }
> > >
> > > normalize_dtb () {
> > > diff --git a/meta/recipes-kernel/linux/linux-yocto.inc
> > > b/meta/recipes-kernel/linux/linux-yocto.inc
> > > index 637506a2a8..4e0ce029da 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")))
> > > }
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