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author | Yury Norov <yury.norov@gmail.com> | 2023-07-17 12:17:03 -0700 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-11 12:08:10 +0200 |
commit | 6289d5486d36d6294a16eaeae1d31045dda14eee (patch) | |
tree | 4655f3172dd3e145bf8e2c95e811ccf915291941 /ipc/sem.c | |
parent | 0ca5de8309f9942cf59190732a37fd251cc60ad1 (diff) | |
download | linux-6289d5486d36d6294a16eaeae1d31045dda14eee.tar.gz |
lib/bitmap: workaround const_eval test build failure
[ Upstream commit 2356d198d2b4ddec24efea98271cb3be230bc787 ] When building with Clang, and when KASAN and GCOV_PROFILE_ALL are both enabled, the test fails to build [1]: >> lib/test_bitmap.c:920:2: error: call to '__compiletime_assert_239' declared with 'error' attribute: BUILD_BUG_ON failed: !__builtin_constant_p(res) BUILD_BUG_ON(!__builtin_constant_p(res)); ^ include/linux/build_bug.h:50:2: note: expanded from macro 'BUILD_BUG_ON' BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) ^ include/linux/build_bug.h:39:37: note: expanded from macro 'BUILD_BUG_ON_MSG' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^ include/linux/compiler_types.h:352:2: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^ include/linux/compiler_types.h:340:2: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ^ include/linux/compiler_types.h:333:4: note: expanded from macro '__compiletime_assert' prefix ## suffix(); \ ^ <scratch space>:185:1: note: expanded from here __compiletime_assert_239 Originally it was attributed to s390, which now looks seemingly wrong. The issue is not related to bitmap code itself, but it breaks build for a given configuration. Disabling the const_eval test under that config may potentially hide other bugs. Instead, workaround it by disabling GCOV for the test_bitmap unless the compiler will get fixed. [1] https://github.com/ClangBuiltLinux/linux/issues/1874 Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202307171254.yFcH97ej-lkp@intel.com/ Fixes: dc34d5036692 ("lib: test_bitmap: add compile-time optimization/evaluations assertions") Co-developed-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Yury Norov <yury.norov@gmail.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'ipc/sem.c')
0 files changed, 0 insertions, 0 deletions