# git rev-parse -q --verify 5a72345e6a78120368fcc841b570331b6c5a50da^{commit} 5a72345e6a78120368fcc841b570331b6c5a50da already have revision, skipping fetch # git checkout -q -f -B kisskb 5a72345e6a78120368fcc841b570331b6c5a50da # git clean -qxdf # < git log -1 # commit 5a72345e6a78120368fcc841b570331b6c5a50da # Author: Michael Ellerman # Date: Fri Feb 11 17:32:37 2022 +1100 # # powerpc: Fix STACKTRACE=n build # # Our skiroot_defconfig doesn't enable FTRACE, and so doesn't get # STACKTRACE enabled either. That leads to a build failure since commit # 1614b2b11fab ("arch: Make ARCH_STACKWALK independent of STACKTRACE") # made stacktrace.c build even when STACKTRACE=n. # # arch/powerpc/kernel/stacktrace.c: In function ‘handle_backtrace_ipi’: # arch/powerpc/kernel/stacktrace.c:171:2: error: implicit declaration of function ‘nmi_cpu_backtrace’ # 171 | nmi_cpu_backtrace(regs); # | ^~~~~~~~~~~~~~~~~ # arch/powerpc/kernel/stacktrace.c: In function ‘arch_trigger_cpumask_backtrace’: # arch/powerpc/kernel/stacktrace.c:226:2: error: implicit declaration of function ‘nmi_trigger_cpumask_backtrace’ # 226 | nmi_trigger_cpumask_backtrace(mask, exclude_self, raise_backtrace_ipi); # | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # # This happens because our headers haven't defined # arch_trigger_cpumask_backtrace, which causes lib/nmi_backtrace.c not to # build nmi_cpu_backtrace(). # # The code in question doesn't actually depend on STACKTRACE=y, that was # just added because arch_trigger_cpumask_backtrace() lived in # stacktrace.c for convenience. So drop the dependency on # CONFIG_STACKTRACE, that causes lib/nmi_backtrace.c to build # nmi_cpu_backtrace() etc. and fixes the build. # # Fixes: 1614b2b11fab ("arch: Make ARCH_STACKWALK independent of STACKTRACE") # Signed-off-by: Michael Ellerman # Link: https://lore.kernel.org/r/20220212111349.2806972-1-mpe@ellerman.id.au # < /opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 5a72345e6a78120368fcc841b570331b6c5a50da # < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_defconfig+KVM_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- mpc85xx_defconfig # Added to kconfig CONFIG_PPC_E500MC=y # Added to kconfig CONFIG_VIRTUALIZATION=y # Added to kconfig CONFIG_KVM_E500MC=y # Added to kconfig # < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_defconfig+KVM_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_defconfig+KVM_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig .config:4324:warning: override: reassigning to symbol PPC_E500MC .config:4325:warning: override: reassigning to symbol VIRTUALIZATION # make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_defconfig+KVM_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- In file included from /kisskb/src/include/linux/bitops.h:33, from /kisskb/src/include/linux/kernel.h:22, from /kisskb/src/include/linux/cpumask.h:10, from /kisskb/src/include/linux/smp.h:13, from /kisskb/src/include/linux/lockdep.h:14, from /kisskb/src/include/linux/mutex.h:17, from /kisskb/src/arch/powerpc/include/asm/kvm_ppc.h:15, from /kisskb/src/arch/powerpc/kvm/e500_emulate.c:12: /kisskb/src/arch/powerpc/include/asm/bitops.h: In function 'kvmppc_core_emulate_op_e500': /kisskb/src/arch/powerpc/include/asm/bitops.h:104:3: error: asm operand 2 probably doesn't match constraints [-Werror] 104 | asm volatile ( \ | ^~~ /kisskb/src/arch/powerpc/include/asm/bitops.h:126:1: note: in expansion of macro 'DEFINE_CLROP' 126 | DEFINE_CLROP(clear_bits, "") | ^~~~~~~~~~~~ /kisskb/src/arch/powerpc/include/asm/bitops.h:104:3: error: impossible constraint in 'asm' 104 | asm volatile ( \ | ^~~ /kisskb/src/arch/powerpc/include/asm/bitops.h:126:1: note: in expansion of macro 'DEFINE_CLROP' 126 | DEFINE_CLROP(clear_bits, "") | ^~~~~~~~~~~~ cc1: all warnings being treated as errors make[3]: *** [/kisskb/src/scripts/Makefile.build:288: arch/powerpc/kvm/e500_emulate.o] Error 1 make[3]: *** Waiting for unfinished jobs.... make[2]: *** [/kisskb/src/scripts/Makefile.build:550: arch/powerpc/kvm] Error 2 make[2]: *** Waiting for unfinished jobs.... make[1]: *** [/kisskb/src/Makefile:1831: arch/powerpc] Error 2 make[1]: *** Waiting for unfinished jobs.... make: *** [Makefile:219: __sub-make] Error 2 Command 'make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_defconfig+KVM_powerpc-gcc9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-9.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux- ' returned non-zero exit status 2 # rm -rf /kisskb/build/powerpc-next_mpc85xx_defconfig+KVM_powerpc-gcc9 # Build took: 0:01:12.588720