Hi Naresh, Thank you for the report! On 5/12/21 5:47 PM, Naresh Kamboju wrote: > On Wed, 12 May 2021 at 20:22, Greg Kroah-Hartman > <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: >> This is the start of the stable review cycle for the 5.4.119 release. >> There are 244 patches in this series, all will be posted as a response >> to this one. If anyone has any issues with these being applied, please >> let me know. >> >> Responses should be made by Fri, 14 May 2021 14:47:09 +0000. >> Anything received after that time might be too late. >> >> The whole patch series can be found in one patch at: >> https://www.kernel.org/pub/linux/kernel/v5.x/stable-review/patch-5.4.119-rc1.gz >> or in the git tree and branch at: >> git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.4.y >> and the diffstat can be found below. >> >> thanks, >> >> greg k-h > Build regression detected. > >> Alexandru Elisei <alexandru.elisei@xxxxxxx> >> KVM: arm64: Initialize VCPU mdcr_el2 before loading it > stable rc 5.4 arm axm55xx_defconfig builds failed due to these > warnings / errors. > - arm (axm55xx_defconfig) with gcc-8,9 and 10 failed > > arch/arm/kvm/../../../virt/kvm/arm/arm.c: In function 'kvm_vcpu_first_run_init': > arch/arm/kvm/../../../virt/kvm/arm/arm.c:582:2: error: implicit > declaration of function 'kvm_arm_vcpu_init_debug'; did you mean > 'kvm_arm_init_debug'? [-Werror=implicit-function-declaration] > kvm_arm_vcpu_init_debug(vcpu); > ^~~~~~~~~~~~~~~~~~~~~~~ > kvm_arm_init_debug > cc1: some warnings being treated as errors This is my fault, in Linux v5.4 KVM for arm is still around, and there's no prototype for the function when compiling for arm. I suspect that's also the case for v4.19. I made this change to get it to build: $ git diff diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h index dd03d5e01a94..32564b017ba0 100644 --- a/arch/arm/include/asm/kvm_host.h +++ b/arch/arm/include/asm/kvm_host.h @@ -335,6 +335,7 @@ static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {} static inline void kvm_arm_init_debug(void) {} +static inline void kvm_arm_vcpu_init_debug(struct kvm_vcpu *vcpu) {} static inline void kvm_arm_setup_debug(struct kvm_vcpu *vcpu) {} static inline void kvm_arm_clear_debug(struct kvm_vcpu *vcpu) {} static inline void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu) {} which matches the stub for kvm_arm_init_debug(). I can spin a patch out of it and send it for 5.4 and 4.19. Marc, what do you think? Thanks, Alex > > > steps to reproduce: > -------------------- > #!/bin/sh > > # TuxMake is a command line tool and Python library that provides > # portable and repeatable Linux kernel builds across a variety of > # architectures, toolchains, kernel configurations, and make targets. > # > # TuxMake supports the concept of runtimes. > # See https://docs.tuxmake.org/runtimes/, for that to work it requires > # that you install podman or docker on your system. > # > # To install tuxmake on your system globally: > # sudo pip3 install -U tuxmake > # > # See https://docs.tuxmake.org/ for complete documentation. > > > tuxmake --runtime podman --target-arch arm --toolchain gcc-8 --kconfig > axm55xx_defconfig > > ref: > https://builds.tuxbuild.com/1sRT0HOyHnZ8N5ktJmaEcMIQZL0/ > > > -- > Linaro LKFT > https://lkft.linaro.org
