Seen in a build: CC arch/x86/kernel/dumpstack.o arch/x86/kernel/dumpstack.o: warning: objtool: oops_begin()+0x9: undefined stack state arch/x86/kernel/dumpstack.o: warning: objtool: oops_begin()+0x0: stack state mismatch: cfa1=6+16 cfa2=7+8
Probably a gcc9 code generation that objtool doesn't know about?
