lib/overflow_kunit.c:728:38: sparse: sparse: undefined preprocessor identifier '__clang_major__'

From: kernel test robot
Date: Fri Dec 01 2023 - 16:01:22 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 994d5c58e50e91bb02c7be4a91d5186292a895c8
commit: 0e5b9f25b27a7a92880f88f5dba3edf726ec5f61 overflow: disable failing tests for older clang versions
date: 1 year, 1 month ago
config: hexagon-randconfig-r121-20231119 (https://download.01.org/0day-ci/archive/20231202/202312020406.V5RUTSeC-lkp@xxxxxxxxx/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce: (https://download.01.org/0day-ci/archive/20231202/202312020406.V5RUTSeC-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312020406.V5RUTSeC-lkp@xxxxxxxxx/

sparse warnings: (new ones prefixed by >>)
>> lib/overflow_kunit.c:728:38: sparse: sparse: undefined preprocessor identifier '__clang_major__'
lib/overflow_kunit.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/umh.h, include/linux/kmod.h, ...):
include/linux/page-flags.h:248:46: sparse: sparse: self-comparison always evaluates to false
lib/overflow_kunit.c:270:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:270:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:270:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:270:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:270:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:270:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:270:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:270:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:270:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:270:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:271:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:271:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:271:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:271:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:271:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:271:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:271:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:271:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:271:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:271:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:272:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:272:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:272:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:272:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:272:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:272:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:272:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:272:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:272:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:272:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:273:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:273:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:273:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:273:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:273:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:273:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:273:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:273:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:273:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:273:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:274:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:274:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:274:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:274:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:274:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:274:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:274:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:274:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:274:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:274:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:275:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:275:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:275:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:275:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:275:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:275:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:275:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:275:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:275:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:275:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:286:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:286:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:286:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:286:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:286:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:286:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:286:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:286:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:286:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:286:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:292:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:292:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:292:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:292:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:292:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:292:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:292:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:292:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:292:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:292:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:299:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:299:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:299:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:299:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:299:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:299:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:299:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:299:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:299:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:299:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:306:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:306:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:306:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:306:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:306:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:306:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:306:1: sparse: sparse: self-comparison always evaluates to true
lib/overflow_kunit.c:306:1: sparse: sparse: self-comparison always evaluates to true

vim +/__clang_major__ +728 lib/overflow_kunit.c

711
712 static struct kunit_case overflow_test_cases[] = {
713 KUNIT_CASE(u8_u8__u8_overflow_test),
714 KUNIT_CASE(s8_s8__s8_overflow_test),
715 KUNIT_CASE(u16_u16__u16_overflow_test),
716 KUNIT_CASE(s16_s16__s16_overflow_test),
717 KUNIT_CASE(u32_u32__u32_overflow_test),
718 KUNIT_CASE(s32_s32__s32_overflow_test),
719 /* Clang 13 and earlier generate unwanted libcalls on 32-bit. */
720 #if BITS_PER_LONG == 64
721 KUNIT_CASE(u64_u64__u64_overflow_test),
722 KUNIT_CASE(s64_s64__s64_overflow_test),
723 #endif
724 /*
725 * Clang 11 and earlier generate unwanted libcalls for signed output, unsigned
726 * input.
727 */
> 728 #if !(defined(CONFIG_CC_IS_CLANG) && __clang_major__ <= 11)
729 KUNIT_CASE(u32_u32__int_overflow_test),
730 #endif
731 KUNIT_CASE(u32_u32__u8_overflow_test),
732 KUNIT_CASE(u8_u8__int_overflow_test),
733 KUNIT_CASE(int_int__u8_overflow_test),
734 KUNIT_CASE(shift_sane_test),
735 KUNIT_CASE(shift_overflow_test),
736 KUNIT_CASE(shift_truncate_test),
737 KUNIT_CASE(shift_nonsense_test),
738 KUNIT_CASE(overflow_allocation_test),
739 KUNIT_CASE(overflow_size_helpers_test),
740 {}
741 };
742

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Next message: Bjorn Helgaas: "Re: [PATCH v2 1/1] x86/PCI: Clean up open-coded return code mangling"
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