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Paul Gortmaker sent along the following fixup for 4.19-rt: [ Author: Paul Gortmaker <paul.gortmaker@windriver.com> Date: Mon Apr 15 12:01:31 2019 -0400 Revert "mm: handle lru_add_drain_all for UP properly" This reverts commit e6e9d6e290028b0a6b83b563fad9fafa7f1d515e. It was a 4.19.31 backport of commit 6ea183d60c46 ("mm: handle lru_add_drain_all for UP properly"). In summary, what that did was to fix a possible harmless WARN_ON on non-SMP, introduced at commit 4d43d395fed1 ("workqueue: Try to catch flush_work() without INIT_WORK().") by adding non-SMP variants of lru functions. The combination of that, with the -rt commit 473f14a9f234 ("mm: perform lru_add_drain_all() remotely") at the merge of the two results in the following build failure: mm/swap.c:736:2: error: #endif without #if since the -rt change wants RT specific lru and the stable backport wants non-SMP specific lru, and a chunk of the backport with an #ifdef CONFIG_SMP is missing. However, before we add a four way cluster of ifdeffery to handle all cases, we note 4d43d395fed1 was added to the v5.1 release, and it was not (currently) backported to any 4.19.x stable release - so it is unclear to me why this commit was ever backported to 4.19.31 at all. Further, we note this change was to mm/swap.c -- and by definition, any preempt-rt deployment that uses swap for anything other than a failure contingency mitigation is broken by design. Given all that, I decided that the best path forward was to revert the two of the three chunks of the backport that remain in the -rt branch, and return us to the pre-4.19.31 merge behaviour for -rt. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> ] (From OE-Core rev: dfe57d439559cc7d1d662a64f0040cd176c1afa7) Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
44 lines
1.7 KiB
BlitzBasic
44 lines
1.7 KiB
BlitzBasic
KBRANCH ?= "v4.19/standard/preempt-rt/base"
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require recipes-kernel/linux/linux-yocto.inc
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# Skip processing of this recipe if it is not explicitly specified as the
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# PREFERRED_PROVIDER for virtual/kernel. This avoids errors when trying
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# to build multiple virtual/kernel providers, e.g. as dependency of
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# core-image-rt-sdk, core-image-rt.
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python () {
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if d.getVar("KERNEL_PACKAGE_NAME") == "kernel" and d.getVar("PREFERRED_PROVIDER_virtual/kernel") != "linux-yocto-rt":
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raise bb.parse.SkipRecipe("Set PREFERRED_PROVIDER_virtual/kernel to linux-yocto-rt to enable it")
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}
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SRCREV_machine ?= "c279a81f1e654023c4cc78afa9f14350ee5f836f"
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SRCREV_meta ?= "9bda6190bfc9e7858c2f7588109a0ec966f37a09"
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SRC_URI = "git://git.yoctoproject.org/linux-yocto.git;branch=${KBRANCH};name=machine \
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git://git.yoctoproject.org/yocto-kernel-cache;type=kmeta;name=meta;branch=yocto-4.19;destsuffix=${KMETA}"
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LINUX_VERSION ?= "4.19.34"
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LIC_FILES_CHKSUM = "file://COPYING;md5=bbea815ee2795b2f4230826c0c6b8814"
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DEPENDS += "${@bb.utils.contains('ARCH', 'x86', 'elfutils-native', '', d)}"
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DEPENDS += "openssl-native util-linux-native"
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PV = "${LINUX_VERSION}+git${SRCPV}"
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KMETA = "kernel-meta"
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KCONF_BSP_AUDIT_LEVEL = "2"
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LINUX_KERNEL_TYPE = "preempt-rt"
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COMPATIBLE_MACHINE = "(qemux86|qemux86-64|qemuarm|qemuarmv5|qemuarm64|qemuppc|qemumips)"
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KERNEL_DEVICETREE_qemuarm = "versatile-pb.dtb"
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# Functionality flags
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KERNEL_EXTRA_FEATURES ?= "features/netfilter/netfilter.scc features/taskstats/taskstats.scc"
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KERNEL_FEATURES_append = " ${KERNEL_EXTRA_FEATURES}"
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KERNEL_FEATURES_append_qemuall=" cfg/virtio.scc"
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KERNEL_FEATURES_append_qemux86=" cfg/sound.scc cfg/paravirt_kvm.scc"
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KERNEL_FEATURES_append_qemux86-64=" cfg/sound.scc cfg/paravirt_kvm.scc"
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