On 19.04.2018 04:58, Fengguang Wu wrote: > FYI this happens in mainline kernel 4.17.0-rc1. > It at least dates back to v4.5 .
This is likely the result of compiling the kernel with GCC 7 while specifying that gcov-kernel should expect GCC <= 3.4 format data: dmesg: > (gcc version 7.3.0 (Debian 7.3.0-1)) #31 Mon Apr 16 23:17:50 CST 2018 .config: > # CONFIG_GCOV_FORMAT_AUTODETECT is not set > CONFIG_GCOV_FORMAT_3_4=y > # CONFIG_GCOV_FORMAT_4_7 is not set As such, it is an expected test failure. Assuming that this is a randconfig test, my recommendation would be to blacklist "CONFIG_GCOV_FORMAT_3_4=y" when using GCC >3.4. -- Peter Oberparleiter Linux on Z Development - IBM Germany
