Hi Sasha, Greg, On 2019/11/4 7:22, Naresh Kamboju wrote: > stable rc 4.19 branch build broken for arm64 with the below error log, > > Build error log, > arch/arm64/kernel/cpufeature.c: In function 'unmap_kernel_at_el0': > arch/arm64/kernel/cpufeature.c:909:21: error: 'MIDR_HISI_TSV110' > undeclared (first use in this function); did you mean > 'GICR_ISACTIVER0'? > MIDR_ALL_VERSIONS(MIDR_HISI_TSV110), > ^ > arch/arm64/include/asm/cputype.h:141:12: note: in definition of macro > 'MIDR_RANGE' > .model = m, \ > ^ > arch/arm64/kernel/cpufeature.c:909:3: note: in expansion of macro > 'MIDR_ALL_VERSIONS' > MIDR_ALL_VERSIONS(MIDR_HISI_TSV110), > ^~~~~~~~~~~~~~~~~ > arch/arm64/kernel/cpufeature.c:909:21: note: each undeclared > identifier is reported only once for each function it appears in > MIDR_ALL_VERSIONS(MIDR_HISI_TSV110), > ^ > arch/arm64/include/asm/cputype.h:141:12: note: in definition of macro > 'MIDR_RANGE' > .model = m, \ > ^ > arch/arm64/kernel/cpufeature.c:909:3: note: in expansion of macro > 'MIDR_ALL_VERSIONS' > MIDR_ALL_VERSIONS(MIDR_HISI_TSV110), Patch "efd00c7 arm64: Add MIDR encoding for HiSilicon Taishan CPUs" needs to be bacported as well, would you like me to do that, or just cherry-pick by yourself? Thanks Hanjun