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And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Ilpo-J-rvinen/selftests-resctrl-Generalize-non-contiguous-CAT-check/20240829-212248 base: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git next patch link: https://lore.kernel.org/r/20240829131657.1917-4-ilpo.jarvinen%40linux.intel.com patch subject: [PATCH v3 3/3] kselftest: Provide __cpuid_count() stub on non-x86 archs :::::: branch date: 3 days ago :::::: commit date: 3 days ago compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240901/202409010931.Xl6TB9hc-lkp@intel.com/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 | Closes: https://lore.kernel.org/r/202409010931.Xl6TB9hc-lkp@intel.com/ All warnings (new ones prefixed by >>): corrupt_xstate_header.c: In function 'xsave_enabled': >> corrupt_xstate_header.c:29:20: warning: 'ecx' is used uninitialized [-Wuninitialized] 29 | return ecx & (1U << 27); | ~~~~^~~~~~~~~~~~ corrupt_xstate_header.c:24:32: note: 'ecx' was declared here 24 | unsigned int eax, ebx, ecx, edx; | ^~~ -- amx.c: In function 'check_cpuid_xtiledata': >> amx.c:123:19: warning: 'ebx' is used uninitialized [-Wuninitialized] 123 | xbuf_size = ebx; | ~~~~~~~~~~^~~~~ amx.c:111:23: note: 'ebx' was declared here 111 | uint32_t eax, ebx, ecx, edx; | ^~~ >> amx.c:131:13: warning: 'eax' is used uninitialized [-Wuninitialized] 131 | if (!eax || !ebx) | ^~~~ amx.c:111:18: note: 'eax' was declared here 111 | uint32_t eax, ebx, ecx, edx; | ^~~ -- lam.c: In function 'cpu_has_lam': >> lam.c:124:24: warning: 'cpuinfo' is used uninitialized [-Wuninitialized] 124 | return (cpuinfo[0] & (1 << 26)); | ~~~~~~~^~~ lam.c:120:22: note: 'cpuinfo' declared here 120 | unsigned int cpuinfo[4]; | ^~~~~~~ lam.c: In function 'cpu_has_la57': lam.c:134:24: warning: 'cpuinfo' is used uninitialized [-Wuninitialized] 134 | return (cpuinfo[2] & (1 << 16)); | ~~~~~~~^~~ lam.c:130:22: note: 'cpuinfo' declared here 130 | unsigned int cpuinfo[4]; | ^~~~~~~ vim +/ecx +29 tools/testing/selftests/x86/corrupt_xstate_header.c b7c11876d24bdd7 Andy Lutomirski 2021-06-08 21 b7c11876d24bdd7 Andy Lutomirski 2021-06-08 22 static inline int xsave_enabled(void) b7c11876d24bdd7 Andy Lutomirski 2021-06-08 23 { b7c11876d24bdd7 Andy Lutomirski 2021-06-08 24 unsigned int eax, ebx, ecx, edx; b7c11876d24bdd7 Andy Lutomirski 2021-06-08 25 170d1c23f2a3569 Reinette Chatre 2022-04-25 26 __cpuid_count(0x1, 0x0, eax, ebx, ecx, edx); b7c11876d24bdd7 Andy Lutomirski 2021-06-08 27 b7c11876d24bdd7 Andy Lutomirski 2021-06-08 28 /* Is CR4.OSXSAVE enabled ? */ b7c11876d24bdd7 Andy Lutomirski 2021-06-08 @29 return ecx & (1U << 27); b7c11876d24bdd7 Andy Lutomirski 2021-06-08 30 } b7c11876d24bdd7 Andy Lutomirski 2021-06-08 31 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki