Hi Mathieu, I love your patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on linux/master v5.7-rc3 next-20200501] [cannot apply to rpmsg/for-next] [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/Mathieu-Poirier/rpmsg-core-Add-support-for-name-extension/20200502-050248 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 052c467cb58748e302a95546925928e637025acc config: x86_64-fedora-25 (attached as .config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot All errors (new ones prefixed by >>): ld: drivers/net/wireless/ath/wcn36xx/smd.o: in function `rpmsg_device_get_name_extension': >> include/linux/rpmsg.h:250: multiple definition of `rpmsg_device_get_name_extension'; drivers/net/wireless/ath/wcn36xx/main.o:include/linux/rpmsg.h:250: first defined here vim +250 include/linux/rpmsg.h 247 248 const char *rpmsg_device_get_name_extension(struct rpmsg_device *dev, 249 unsigned int skip) > 250 { 251 /* This shouldn't be possible */ 252 WARN_ON(1); 253 254 return NULL; 255 } 256 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org