Hi Jiri, I love your patch! Perhaps something to improve: [auto build test WARNING on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Jiri-Olsa/cpuidle-rcu-Making-arch_cpu_idle-and-rcu_idle_exit-noinstr/20220516-043752 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: x86_64-randconfig-c002-20220516 (https://download.01.org/0day-ci/archive/20220517/202205171050.9msZot6F-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.2.0-20) 11.2.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/0b6fee32d730f621f2bfc4d8d9f0729814398415 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Jiri-Olsa/cpuidle-rcu-Making-arch_cpu_idle-and-rcu_idle_exit-noinstr/20220516-043752 git checkout 0b6fee32d730f621f2bfc4d8d9f0729814398415 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> vmlinux.o: warning: objtool: arch_cpu_idle()+0x0: call to {dynamic}() leaves .noinstr.text section >> vmlinux.o: warning: objtool: rcu_idle_exit()+0x16: call to trace_hardirqs_off() leaves .noinstr.text section vmlinux.o: warning: objtool: enter_from_user_mode()+0x18: call to __kcsan_check_access() leaves .noinstr.text section vmlinux.o: warning: objtool: syscall_enter_from_user_mode()+0x1d: call to __kcsan_check_access() leaves .noinstr.text section vmlinux.o: warning: objtool: syscall_enter_from_user_mode_prepare()+0x18: call to __kcsan_check_access() leaves .noinstr.text section vmlinux.o: warning: objtool: irqentry_enter_from_user_mode()+0x18: call to __kcsan_check_access() leaves .noinstr.text section -- 0-DAY CI Kernel Test Service https://01.org/lkp
