On Thu, Apr 16, 2020 at 10:50:23PM +0200, Alexandre Belloni wrote: > Hi, > > On 16/04/2020 14:22:03+0800, kbuild test robot wrote: > > Hi Alexandre, > > > > I love your patch! Yet something to improve: > > > > [auto build test ERROR on iio/togreg] > > [also build test ERROR on v5.7-rc1 next-20200415] > > [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/Alexandre-Belloni/iio-adc-ti-ads8344-improve-the-driver/20200416-073357 > > base: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg > > config: c6x-allyesconfig (attached as .config) > > compiler: c6x-elf-gcc (GCC) 9.3.0 > > 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 > > COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=c6x > > > > I spent some time to reproduce and this is actually not that trivial > because your toolchains are linked with libisl22 and most distributions > still ship an older version. Maybe you can do something about that? Thanks for the feedback, we will resolve this to use old version in earliest time. > > > If you fix the issue, kindly add following tag as appropriate > > Reported-by: kbuild test robot <lkp@xxxxxxxxx> > > > > All errors (new ones prefixed by >>): > > > > > > vim +/302 +96 drivers/iio/adc/ti-ads8344.c > > > > 72 > > 73 static int ads8344_adc_conversion(struct ads8344 *adc, int channel, > > 74 bool differential) > > 75 { > > 76 struct spi_device *spi = adc->spi; > > 77 int ret; > > 78 u8 buf[3]; > > 79 > > 80 adc->tx_buf = ADS8344_START; > > 81 if (!differential) > > 82 adc->tx_buf |= ADS8344_SINGLE_END; > > 83 adc->tx_buf |= ADS8344_CHANNEL(channel); > > 84 adc->tx_buf |= ADS8344_CLOCK_INTERNAL; > > 85 > > 86 ret = spi_write(spi, &adc->tx_buf, 1); > > 87 if (ret) > > 88 return ret; > > 89 > > 90 udelay(9); > > 91 > > 92 ret = spi_read(spi, buf, sizeof(buf)); > > 93 if (ret) > > 94 return ret; > > 95 > > > 96 return buf[0] << 9 | buf[1] << 1 | buf[2] >> 7; > > 97 } > > 98 > > > > I take it this is a false positive as I don't get any errors when > building this driver with the provided toolchain. However, I see a few > "internal compiler error: in priority, at haifa-sched.c:1599" > > -- > Alexandre Belloni, Bootlin > Embedded Linux and Kernel engineering > https://bootlin.com >
