tree: https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git devel head: b1d08004826c99d8af2be6744a7c623a18965562 commit: b32e61377f052498dd5b44b6029776457bf4cc24 [36/60] include condition in the BUG_ON/WARN_ON output config: i386-randconfig-s001-20200607 (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.1-247-gcadbd124-dirty git checkout b32e61377f052498dd5b44b6029776457bf4cc24 # save the attached .config to linux build tree make W=1 C=1 ARCH=i386 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) vim +801 arch/x86/kernel/cpu/microcode/intel.c ^1da177e4c3f41 arch/i386/kernel/microcode.c Linus Torvalds 2005-04-16 789 3f1f576a195aa2 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2018-02-16 790 static enum ucode_state apply_microcode_intel(int cpu) ^1da177e4c3f41 arch/i386/kernel/microcode.c Linus Torvalds 2005-04-16 791 { d8c3b52c00a050 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2018-02-28 792 struct ucode_cpu_info *uci = ucode_cpu_info + cpu; c182d2b7d0ca48 arch/x86/kernel/cpu/microcode/intel.c Ashok Raj 2018-02-28 793 struct cpuinfo_x86 *c = &cpu_data(cpu); 811ae8ba6dca6b arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2019-08-24 794 bool bsp = c->cpu_index == boot_cpu_data.cpu_index; d8c3b52c00a050 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2018-02-28 795 struct microcode_intel *mc; 8da38ebaad23fe arch/x86/kernel/cpu/microcode/intel.c Filippo Sironi 2018-07-31 796 enum ucode_state ret; 354542d034ab2a arch/x86/kernel/cpu/microcode/intel.c Andi Kleen 2016-06-09 797 static int prev_rev; 4167709bbf8265 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2017-01-09 798 u32 rev; 4bae1967357bfc arch/x86/kernel/microcode_intel.c Ingo Molnar 2009-03-11 799 9a3110bf4bb046 arch/i386/kernel/microcode.c Shaohua Li 2006-09-27 800 /* We should bind the task to the CPU */ 26cbaa4dc676a4 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2016-02-03 @801 if (WARN_ON(raw_smp_processor_id() != cpu)) 3f1f576a195aa2 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2018-02-16 802 return UCODE_ERROR; 9a3110bf4bb046 arch/i386/kernel/microcode.c Shaohua Li 2006-09-27 803 06b8534cb72837 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2016-10-25 804 /* Look for a newer patch in our cache: */ 06b8534cb72837 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2016-10-25 805 mc = find_patch(uci); d8c3b52c00a050 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2018-02-28 806 if (!mc) { d8c3b52c00a050 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2018-02-28 807 mc = uci->mc; de778275c29582 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2016-02-03 808 if (!mc) 3f1f576a195aa2 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2018-02-16 809 return UCODE_NFOUND; 06b8534cb72837 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2016-10-25 810 } 9cd4d78e21cfdc arch/x86/kernel/microcode_intel.c Fenghua Yu 2012-12-20 811 c182d2b7d0ca48 arch/x86/kernel/cpu/microcode/intel.c Ashok Raj 2018-02-28 812 /* c182d2b7d0ca48 arch/x86/kernel/cpu/microcode/intel.c Ashok Raj 2018-02-28 813 * Save us the MSR write below - which is a particular expensive c182d2b7d0ca48 arch/x86/kernel/cpu/microcode/intel.c Ashok Raj 2018-02-28 814 * operation - when the other hyperthread has updated the microcode c182d2b7d0ca48 arch/x86/kernel/cpu/microcode/intel.c Ashok Raj 2018-02-28 815 * already. c182d2b7d0ca48 arch/x86/kernel/cpu/microcode/intel.c Ashok Raj 2018-02-28 816 */ c182d2b7d0ca48 arch/x86/kernel/cpu/microcode/intel.c Ashok Raj 2018-02-28 817 rev = intel_get_microcode_revision(); c182d2b7d0ca48 arch/x86/kernel/cpu/microcode/intel.c Ashok Raj 2018-02-28 818 if (rev >= mc->hdr.rev) { 8da38ebaad23fe arch/x86/kernel/cpu/microcode/intel.c Filippo Sironi 2018-07-31 819 ret = UCODE_OK; 8da38ebaad23fe arch/x86/kernel/cpu/microcode/intel.c Filippo Sironi 2018-07-31 820 goto out; c182d2b7d0ca48 arch/x86/kernel/cpu/microcode/intel.c Ashok Raj 2018-02-28 821 } c182d2b7d0ca48 arch/x86/kernel/cpu/microcode/intel.c Ashok Raj 2018-02-28 822 91df9fdf51492a arch/x86/kernel/cpu/microcode/intel.c Ashok Raj 2018-02-28 823 /* 91df9fdf51492a arch/x86/kernel/cpu/microcode/intel.c Ashok Raj 2018-02-28 824 * Writeback and invalidate caches before updating microcode to avoid 91df9fdf51492a arch/x86/kernel/cpu/microcode/intel.c Ashok Raj 2018-02-28 825 * internal issues depending on what the microcode is updating. 91df9fdf51492a arch/x86/kernel/cpu/microcode/intel.c Ashok Raj 2018-02-28 826 */ 91df9fdf51492a arch/x86/kernel/cpu/microcode/intel.c Ashok Raj 2018-02-28 827 native_wbinvd(); 91df9fdf51492a arch/x86/kernel/cpu/microcode/intel.c Ashok Raj 2018-02-28 828 ^1da177e4c3f41 arch/i386/kernel/microcode.c Linus Torvalds 2005-04-16 829 /* write microcode via MSR 0x79 */ c416e611757521 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2016-02-03 830 wrmsrl(MSR_IA32_UCODE_WRITE, (unsigned long)mc->bits); 245067d1674d45 arch/i386/kernel/microcode.c Zachary Amsden 2005-09-03 831 4167709bbf8265 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2017-01-09 832 rev = intel_get_microcode_revision(); ^1da177e4c3f41 arch/i386/kernel/microcode.c Linus Torvalds 2005-04-16 833 4167709bbf8265 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2017-01-09 834 if (rev != mc->hdr.rev) { f58e1f53de52a7 arch/x86/kernel/microcode_intel.c Joe Perches 2009-12-08 835 pr_err("CPU%d update to revision 0x%x failed\n", 26cbaa4dc676a4 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2016-02-03 836 cpu, mc->hdr.rev); 3f1f576a195aa2 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2018-02-16 837 return UCODE_ERROR; 871b72dd1e12af arch/x86/kernel/microcode_intel.c Dmitry Adamushko 2009-05-11 838 } 26cbaa4dc676a4 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2016-02-03 839 811ae8ba6dca6b arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2019-08-24 840 if (bsp && rev != prev_rev) { 354542d034ab2a arch/x86/kernel/cpu/microcode/intel.c Andi Kleen 2016-06-09 841 pr_info("updated to revision 0x%x, date = %04x-%02x-%02x\n", 4167709bbf8265 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2017-01-09 842 rev, de778275c29582 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2016-02-03 843 mc->hdr.date & 0xffff, de778275c29582 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2016-02-03 844 mc->hdr.date >> 24, de778275c29582 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2016-02-03 845 (mc->hdr.date >> 16) & 0xff); 4167709bbf8265 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2017-01-09 846 prev_rev = rev; 354542d034ab2a arch/x86/kernel/cpu/microcode/intel.c Andi Kleen 2016-06-09 847 } 4bae1967357bfc arch/x86/kernel/microcode_intel.c Ingo Molnar 2009-03-11 848 8da38ebaad23fe arch/x86/kernel/cpu/microcode/intel.c Filippo Sironi 2018-07-31 849 ret = UCODE_UPDATED; 8da38ebaad23fe arch/x86/kernel/cpu/microcode/intel.c Filippo Sironi 2018-07-31 850 8da38ebaad23fe arch/x86/kernel/cpu/microcode/intel.c Filippo Sironi 2018-07-31 851 out: 4167709bbf8265 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2017-01-09 852 uci->cpu_sig.rev = rev; 4167709bbf8265 arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2017-01-09 853 c->microcode = rev; 871b72dd1e12af arch/x86/kernel/microcode_intel.c Dmitry Adamushko 2009-05-11 854 370a132bb2227f arch/x86/kernel/cpu/microcode/intel.c Prarit Bhargava 2018-07-31 855 /* Update boot_cpu_data's revision too, if we're on the BSP: */ 811ae8ba6dca6b arch/x86/kernel/cpu/microcode/intel.c Borislav Petkov 2019-08-24 856 if (bsp) 370a132bb2227f arch/x86/kernel/cpu/microcode/intel.c Prarit Bhargava 2018-07-31 857 boot_cpu_data.microcode = rev; 370a132bb2227f arch/x86/kernel/cpu/microcode/intel.c Prarit Bhargava 2018-07-31 858 8da38ebaad23fe arch/x86/kernel/cpu/microcode/intel.c Filippo Sironi 2018-07-31 859 return ret; ^1da177e4c3f41 arch/i386/kernel/microcode.c Linus Torvalds 2005-04-16 860 } ^1da177e4c3f41 arch/i386/kernel/microcode.c Linus Torvalds 2005-04-16 861 :::::: The code at line 801 was first introduced by commit :::::: 26cbaa4dc676a444aa626cbc642c4c8181ef1378 x86/microcode/intel: Cleanup apply_microcode_intel() :::::: TO: Borislav Petkov <bp(a)suse.de&gt; :::::: CC: Ingo Molnar <mingo(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org