tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/static_call head: 814cfbceba54e980b1f949a13d04b1909bbe80da commit: b2f0c8b71eec8a5833ae2eeecccf741b36171869 [11/34] x86/ftrace: Use text_gen_insn() config: x86_64-lkp (attached as .config) compiler: gcc-7 (Debian 7.4.0-13) 7.4.0 reproduce: git checkout b2f0c8b71eec8a5833ae2eeecccf741b36171869 # save the attached .config to linux build tree make ARCH=x86_64 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from arch/x86/include/asm/bug.h:83:0, from include/linux/bug.h:5, from include/linux/thread_info.h:12, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from arch/x86/kernel/ftrace.c:15: arch/x86/kernel/ftrace.c: In function 'addr_from_call': if (WARN_ON_ONCE(call.op != CALL_INSN_OPCODE)) { ^ include/asm-generic/bug.h:96:25: note: in definition of macro 'WARN_ON_ONCE' int __ret_warn_on = !!(condition); \ ^~~~~~~~~ In file included from include/linux/kernel.h:15:0, from include/linux/list.h:9, from include/linux/preempt.h:11, from include/linux/spinlock.h:51, from arch/x86/kernel/ftrace.c:15: arch/x86/kernel/ftrace.c:469:40: error: 'union text_poke_insn' has no member named 'op' pr_warn("Expected E8, got %x\n", call.op); ^ include/linux/printk.h:306:37: note: in definition of macro 'pr_warning' printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) ^~~~~~~~~~~ arch/x86/kernel/ftrace.c:469:3: note: in expansion of macro 'pr_warn' pr_warn("Expected E8, got %x\n", call.op); ^~~~~~~ vim +468 arch/x86/kernel/ftrace.c 456 457 /* Return the address of the function the trampoline calls */ 458 static void *addr_from_call(void *ptr) 459 { 460 union text_poke_insn call; 461 int ret; 462 463 ret = probe_kernel_read(&call, ptr, CALL_INSN_SIZE); 464 if (WARN_ON_ONCE(ret < 0)) 465 return NULL; 466 467 /* Make sure this is a call */ 469 pr_warn("Expected E8, got %x\n", call.op); 470 return NULL; 471 } 472 473 return ptr + CALL_INSN_SIZE + call.disp; 474 } 475 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation