On 2019/07/13 18:10, kbuild test robot wrote: > tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/axboe/linux-block.git for-linus > head: 787c79d6393fc028887cc1b6066915f0b094e92f > commit: b091ac616846a1da75b1f2566b41255ce7f0e0a6 [20/23] sd_zbc: Fix report zones buffer allocation > config: c6x-allyesconfig (attached as .config) > compiler: c6x-elf-gcc (GCC) 7.4.0 > reproduce: > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > git checkout b091ac616846a1da75b1f2566b41255ce7f0e0a6 > # save the attached .config to linux build tree > GCC_VERSION=7.4.0 make.cross ARCH=c6x > > 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 >>): > > In file included from include/asm-generic/bug.h:18:0, > from arch/c6x/include/asm/bug.h:12, > from include/linux/bug.h:5, > from include/linux/thread_info.h:12, > from include/asm-generic/current.h:5, > from ./arch/c6x/include/generated/asm/current.h:1, > from include/linux/sched.h:12, > from include/linux/blkdev.h:5, > from drivers//scsi/sd_zbc.c:11: > drivers//scsi/sd_zbc.c: In function 'sd_zbc_read_zones': >>> include/linux/kernel.h:62:48: warning: 'zone_blocks' may be used uninitialized in this function [-Wmaybe-uninitialized] > #define __round_mask(x, y) ((__typeof__(x))((y)-1)) > ^ > drivers//scsi/sd_zbc.c:464:6: note: 'zone_blocks' was declared here > u32 zone_blocks; > ^~~~~~~~~~~ [...] Jens, This warning does not show up on x86_64 native build with gcc 9.1. I just sent a patch to remove the warning, but I do not have a c6x cross compilation environment available so the patch was checked only on x86. Best regards. -- Damien Le Moal Western Digital Research
