Hi Andy, I love your patch! Perhaps something to improve: [auto build test WARNING on pm/linux-next] [cannot apply to v5.3 next-20190920] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Andy-Shevchenko/ACPI-utils-Describe-function-parameters-in-kernel-doc/20190924-230504 base: https://kernel.googlesource.com/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next config: i386-tinyconfig (attached as .config) compiler: gcc-7 (Debian 7.4.0-13) 7.4.0 reproduce: # save the attached .config to linux build tree make ARCH=i386 If you fix the issue, kindly add following tag Reported-by: kbuild test robot All warnings (new ones prefixed by >>): In file included from init/main.c:30:0: >> include/linux/acpi.h:665:50: warning: 'struct acpi_device' declared inside parameter list will not be visible outside of this definition or declaration static inline bool acpi_dev_hid_uid_match(struct acpi_device *adev, ^~~~~~~~~~~ vim +665 include/linux/acpi.h 664 > 665 static inline bool acpi_dev_hid_uid_match(struct acpi_device *adev, 666 const char *hid2, const char *uid2) 667 { 668 return false; 669 } 670 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation