tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: c503e3eec382ac708ee7adf874add37b77c5d312 commit: 0f55b43dedcdae2b871f0fec59d8c672e62ff5de [9417/16121] coresight: etm: Override TRCIDR3.CCITMIN on errata affected cpus config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20231030/202310302043.as36UFED-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231030/202310302043.as36UFED-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/202310302043.as36UFED-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/hwtracing/coresight/coresight-etm4x-core.c:1183:24: warning: result of comparison of constant 256 with expression of type 'u8' (aka 'unsigned char') is always false [-Wtautological-constant-out-of-range-compare] 1183 | if (drvdata->ccitmin == 256) | ~~~~~~~~~~~~~~~~ ^ ~~~ 1 warning generated. vim +1183 drivers/hwtracing/coresight/coresight-etm4x-core.c 1172 1173 static void etm4_fixup_wrong_ccitmin(struct etmv4_drvdata *drvdata) 1174 { 1175 /* 1176 * Erratum affected cpus will read 256 as the minimum 1177 * instruction trace cycle counting threshold whereas 1178 * the correct value should be 4 instead. Override the 1179 * recorded value for 'drvdata->ccitmin' to workaround 1180 * this problem. 1181 */ 1182 if (is_midr_in_range_list(read_cpuid_id(), etm_wrong_ccitmin_cpus)) { > 1183 if (drvdata->ccitmin == 256) 1184 drvdata->ccitmin = 4; 1185 } 1186 } 1187 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
