Dear Robot, On Sat, Dec 21, 2019 at 5:57 AM kbuild test robot <lkp@xxxxxxxxx> wrote: > > Hi Douglas, > > I love your patch! Perhaps something to improve: > > [auto build test WARNING on linus/master] > [also build test WARNING on v5.5-rc2 next-20191220] > [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/Douglas-Anderson/drm-bridge-ti-sn65dsi86-Improve-support-for-AUO-B116XAK01-other-DP/20191221-083448 > base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 7e0165b2f1a912a06e381e91f0f4e495f4ac3736 > config: sh-allmodconfig (attached as .config) > compiler: sh4-linux-gcc (GCC) 7.5.0 > reproduce: > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > # save the attached .config to linux build tree > GCC_VERSION=7.5.0 make.cross ARCH=sh > > If you fix the issue, kindly add following tag > Reported-by: kbuild test robot <lkp@xxxxxxxxx> > > Note: it may well be a FALSE warning. FWIW you are at least aware of it now. > http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings > > All warnings (new ones prefixed by >>): > > drivers/gpu/drm/bridge/ti-sn65dsi86.c: In function 'ti_sn_bridge_enable': > >> drivers/gpu/drm/bridge/ti-sn65dsi86.c:543:18: warning: 'rate_valid' may be used uninitialized in this function [-Wmaybe-uninitialized] > if (rate_valid[i]) > ~~~~~~~~~~^~~ I love your report! Interestingly I had already noticed this problem myself and v3 of the patch fixes the issue. See: https://lore.kernel.org/r/20191218143416.v3.9.Ib59207b66db377380d13748752d6fce5596462c5@changeid If the maintainer of the robot is reading this, something to improve about your robot is that it could have noticed v3 of the patch (which was posted several days before your report) and skipped analyzing v2 of the patch. I'm currently using Change-Ids embedded in my Message-Id to help automation relate one version of my patches to the next. Specifically you compare the Message-Id of v2 and v3 of this patch: 20191217164702.v2.9.Ib59207b66db377380d13748752d6fce5596462c5@changeid 20191218143416.v3.9.Ib59207b66db377380d13748752d6fce5596462c5@changeid Since the last section before the "@changeid" remained constant it could be assumed that this patch replaced the v2. I know there's not too much usage of this technique yet, but if only more tools supported it then maybe more people would use it. -Doug
