tree: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git testing head: 3347b9d6388587963d199b107278f89f05277a1b commit: 3347b9d6388587963d199b107278f89f05277a1b [19/19] iio: Add basic unit test for iio_format_value() config: powerpc-allyesconfig (attached as .config) compiler: powerpc64-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git/commit/?id=... git remote add iio https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git git fetch --no-tags iio testing git checkout 3347b9d6388587963d199b107278f89f05277a1b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/iio/test/iio-test-format.c: In function 'iio_test_iio_format_value_fixedpoint': 98 | } | ^ vim +98 drivers/iio/test/iio-test-format.c 41 42 static void iio_test_iio_format_value_fixedpoint(struct kunit *test) 43 { 44 char *buf = kunit_kmalloc(test, PAGE_SIZE, GFP_KERNEL); 45 int values[2]; 46 int ret; 47 48 /* positive >= 1 */ 49 values[0] = 1; 50 values[1] = 10; 51 52 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, values); 53 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1.000010\n"); 54 55 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO_DB, 2, values); 56 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1.000010 dB\n"); 57 58 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_NANO, 2, values); 59 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "1.000000010\n"); 60 61 /* positive < 1 */ 62 values[0] = 0; 63 values[1] = 12; 64 65 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, values); 66 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000012\n"); 67 68 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO_DB, 2, values); 69 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000012 dB\n"); 70 71 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_NANO, 2, values); 72 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "0.000000012\n"); 73 74 /* negative <= -1 */ 75 values[0] = -1; 76 values[1] = 10; 77 78 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, values); 79 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-1.000010\n"); 80 81 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO_DB, 2, values); 82 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-1.000010 dB\n"); 83 84 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_NANO, 2, values); 85 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-1.000000010\n"); 86 87 /* negative > -1 */ 88 values[0] = 0; 89 values[1] = -123; 90 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, values); 91 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-0.000123\n"); 92 93 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO_DB, 2, values); 94 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-0.000123 dB\n"); 95 96 ret = iio_format_value(buf, IIO_VAL_INT_PLUS_NANO, 2, values); 97 IIO_TEST_FORMAT_EXPECT_EQ(test, buf, ret, "-0.000000123\n"); 99 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org