Hi "Stephan, Thank you for the patch! Yet something to improve: [auto build test ERROR on char-misc/char-misc-testing] [also build test ERROR on v5.4-rc7 next-20191112] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Stephan-M-ller/dev-random-a-new-... base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git 01b59c763fe2de845b65900485b141fdd7bbf93e config: mips-allmodconfig (attached as .config) compiler: mips-linux-gcc (GCC) 7.4.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.4.0 make.cross ARCH=mips 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 >>): drivers/char/lrng/lrng_sw_noise.c: In function 'add_interrupt_randomness': size_t n = (sizeof(struct pt_regs) / sizeof(u32)); ^~~~~~ ip = instruction_pointer(regs); ^~~~~~~~~~~~~~~~~~~ instruction_hazard cc1: some warnings being treated as errors vim +145 drivers/char/lrng/lrng_sw_noise.c 125 126 /** 127 * Hot code path - Callback for interrupt handler 128 */ 129 void add_interrupt_randomness(int irq, int irq_flags) 130 { 131 lrng_time_process(); 132 133 if (!lrng_pool_highres_timer()) { 134 struct pt_regs *regs = get_irq_regs(); 135 static atomic_t reg_idx = ATOMIC_INIT(0); 136 u64 ip; 137 138 lrng_pool_lfsr_u32(jiffies); 139 lrng_pool_lfsr_u32(irq); 140 lrng_pool_lfsr_u32(irq_flags); 141 142 if (regs) { 143 u32 *ptr = (u32 *)regs; 144 int reg_ptr = atomic_add_return_relaxed(1, &reg_idx); 146 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation