tree: https://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/prandom.git prandom-5.10-v3 head: 3486a21c7e5bafbdbc0f7ea5d40f3dad39022bf4 commit: 3486a21c7e5bafbdbc0f7ea5d40f3dad39022bf4 [2/2] random32: add noise from network and scheduling activity config: arc-defconfig (attached as .config) compiler: arc-elf-gcc (GCC) 9.3.0 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/wtarreau/prandom.git/comm... git remote add wtarreau-prandom https://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/prandom.git git fetch --no-tags wtarreau-prandom prandom-5.10-v3 git checkout 3486a21c7e5bafbdbc0f7ea5d40f3dad39022bf4 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from ./arch/arc/include/generated/asm/percpu.h:1, from include/linux/percpu.h:13, from include/linux/prandom.h:12, from include/linux/random.h:118, from include/linux/net.h:18, from fs/nfs/mount_clnt.c:13: include/linux/prandom.h: In function 'prandom_u32_add_noise': 128 | raw_local_irq_save(__flags); \ | ^~~~~~~~~~~~~~~~~~ include/asm-generic/percpu.h:140:11: note: in expansion of macro '__this_cpu_generic_read_noirq' 140 | __ret = __this_cpu_generic_read_noirq(pcp); \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/percpu.h:320:31: note: in expansion of macro 'this_cpu_generic_read' 320 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp) | ^~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:321:23: note: in expansion of macro 'this_cpu_read_1' 321 | case 1: pscr_ret__ = stem##1(variable); break; \ | ^~~~ include/linux/percpu-defs.h:507:29: note: in expansion of macro '__pcpu_size_call_return' 507 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp) | ^~~~~~~~~~~~~~~~~~~~~~~ include/linux/prandom.h:66:7: note: in expansion of macro 'this_cpu_read' 66 | a ^= this_cpu_read(net_rand_noise); | ^~~~~~~~~~~~~ 130 | raw_local_irq_restore(__flags); \ | ^~~~~~~~~~~~~~~~~~~~~ include/asm-generic/percpu.h:140:11: note: in expansion of macro '__this_cpu_generic_read_noirq' 140 | __ret = __this_cpu_generic_read_noirq(pcp); \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/percpu.h:320:31: note: in expansion of macro 'this_cpu_generic_read' 320 | #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp) | ^~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:321:23: note: in expansion of macro 'this_cpu_read_1' 321 | case 1: pscr_ret__ = stem##1(variable); break; \ | ^~~~ include/linux/percpu-defs.h:507:29: note: in expansion of macro '__pcpu_size_call_return' 507 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp) | ^~~~~~~~~~~~~~~~~~~~~~~ include/linux/prandom.h:66:7: note: in expansion of macro 'this_cpu_read' 66 | a ^= this_cpu_read(net_rand_noise); | ^~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/raw_local_irq_save +128 include/asm-generic/percpu.h 9c28278a24c01c0 Tejun Heo 2014-06-17 123 e88d62cd4b2f0b1 Mark Rutland 2017-09-26 124 #define __this_cpu_generic_read_noirq(pcp) \ e88d62cd4b2f0b1 Mark Rutland 2017-09-26 125 ({ \ e88d62cd4b2f0b1 Mark Rutland 2017-09-26 126 typeof(pcp) __ret; \ e88d62cd4b2f0b1 Mark Rutland 2017-09-26 127 unsigned long __flags; \ e88d62cd4b2f0b1 Mark Rutland 2017-09-26 @128 raw_local_irq_save(__flags); \ e88d62cd4b2f0b1 Mark Rutland 2017-09-26 129 __ret = raw_cpu_generic_read(pcp); \ e88d62cd4b2f0b1 Mark Rutland 2017-09-26 @130 raw_local_irq_restore(__flags); \ e88d62cd4b2f0b1 Mark Rutland 2017-09-26 131 __ret; \ e88d62cd4b2f0b1 Mark Rutland 2017-09-26 132 }) e88d62cd4b2f0b1 Mark Rutland 2017-09-26 133 :::::: The code at line 128 was first introduced by commit :::::: e88d62cd4b2f0b1ae55e9008e79c2794b1fc914d percpu: make this_cpu_generic_read() atomic w.r.t. interrupts :::::: TO: Mark Rutland <mark.rutland(a)arm.com&gt; :::::: CC: Tejun Heo <tj(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org