Le 24/06/2022 à 04:52, Paul E. McKenney a écrit : > On Thu, Jun 23, 2022 at 04:50:49PM +0800, kernel test robot wrote: >> tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master >> head: 08897940f458ee55416cf80ab13d2d8b9f20038e >> commit: 620ac34fef9e21aa2fd4aed6e01eed2e4fc605d4 [4204/5575] context_tracking: Convert state to atomic_t >> config: powerpc-mgcoge_defconfig (https://download.01.org/0day-ci/archive/20220623/202206231654.cuANhsQq-lkp@xxxxxxxxx/config) >> compiler: powerpc-linux-gcc (GCC) 11.3.0 >> reproduce (this is a W=1 build): >> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross >> chmod +x ~/bin/make.cross >> # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=620ac34fef9e21aa2fd4aed6e01eed2e4fc605d4 >> git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git >> git fetch --no-tags linux-next master >> git checkout 620ac34fef9e21aa2fd4aed6e01eed2e4fc605d4 >> # save the config file >> mkdir build_dir && cp config build_dir/.config >> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/kernel/ >> >> If you fix the issue, kindly add following tag where applicable >> Reported-by: kernel test robot <lkp@xxxxxxxxx> >> >> All errors (new ones prefixed by >>): >> >> arch/powerpc/kernel/interrupt.c: In function 'interrupt_exit_kernel_prepare': >>>> arch/powerpc/kernel/interrupt.c:542:55: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body] >> 542 | CT_WARN_ON(ct_state() == CONTEXT_USER); >> | ^ >> cc1: all warnings being treated as errors > > This is a bit odd, and perhaps should instead be written as follows: > > WARN_ON_ONCE(TRAP(regs) != INTERRUPT_PROGRAM && CT_WARN_ON(ct_state() == CONTEXT_USER)); > > But this code has been around for awhile, and was not changed by the > commit called out above. I will let the PowerPC guys choose what they > want to do with it. The commit called out above did a change. It added: #define CT_WARN_ON(cond) When CONFIG_CONTEXT_TRACKING_USER is not defined That change is wrong, it should be: #define CT_WARN_ON(cond) do { } while (0) Christophe
