Building arm:axm55xx_defconfig ... failed -------------- Error log: /tmp/cc2ylxxJ.s: Assembler messages: /tmp/cc2ylxxJ.s:87: Error: co-processor register expected -- `mrc p10,7,r7,FPEXC,cr0,0' /tmp/cc2ylxxJ.s:103: Error: co-processor register expected -- `mcr p10,7,r3,FPEXC,cr0,0' /tmp/cc2ylxxJ.s:537: Error: co-processor register expected -- `mcr p10,7,r7,FPEXC,cr0,0' make[3]: *** [arch/arm/kvm/hyp/switch.o] Error 1 make[2]: *** [arch/arm/kvm/hyp] Error 2 make[2]: *** Waiting for unfinished jobs.... make[1]: *** [arch/arm/kvm] Error 2 make[1]: *** Waiting for unfinished jobs.... make: *** [sub-make] Error 2 -------------- I didn't find an obvious candidate so I bisected it. # bad: [a233c6b3f6de88ca62da8fde45f330b104827851] Linux 4.19.181-rc1 # good: [030194a5b292bb7613407668d85af0b987bb9839] Linux 4.19.180 git bisect start 'HEAD' 'v4.19.180' # good: [ecee76d4b15b8431827e910589edfb4c12a589f9] powerpc/perf: Record counter overflow always if SAMPLE_IP is unset git bisect good ecee76d4b15b8431827e910589edfb4c12a589f9 # good: [722ce092b23ae91337694d40e6ac216b16962788] ARM: 8929/1: use APSR_nzcv instead of r15 as mrc operand git bisect good 722ce092b23ae91337694d40e6ac216b16962788 # bad: [2e6919206bb0bcac507b7905fc7c9b3dd861ab4b] ARM: 9025/1: Kconfig: CPU_BIG_ENDIAN depends on !LD_IS_LLD git bisect bad 2e6919206bb0bcac507b7905fc7c9b3dd861ab4b # good: [831e354481111c30d68c980434e2cfe42590f189] kbuild: add CONFIG_LD_IS_LLD git bisect good 831e354481111c30d68c980434e2cfe42590f189 # bad: [9b99f469087843c9216976865a97da96f9cdcbbc] ARM: 8991/1: use VFP assembler mnemonics if available git bisect bad 9b99f469087843c9216976865a97da96f9cdcbbc # good: [41ad45cb9ecb66f76abc77d938b3693839fb5e20] ARM: 8990/1: use VFP assembler mnemonics in register load/store macros git bisect good 41ad45cb9ecb66f76abc77d938b3693839fb5e20 # first bad commit: [9b99f469087843c9216976865a97da96f9cdcbbc] ARM: 8991/1: use VFP assembler mnemonics if available Reverting the offending patch from v4.19.y-queue fixes the problem. I didn't check v5.4.y-queue. Guenter
