linux-kernel - Re: [PATCH] lib: add basic KUnit test for lib/math

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Date:   Tue, 3 Nov 2020 09:32:15 +0800
From:   kernel test robot <lkp@...el.com>
To:     Daniel Latypov <dlatypov@...gle.com>,
        andriy.shevchenko@...ux.intel.com
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        brendanhiggins@...gle.com, davidgow@...gle.com,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        skhan@...uxfoundation.org, Daniel Latypov <dlatypov@...gle.com>
Subject: Re: [PATCH] lib: add basic KUnit test for lib/math

Hi Daniel,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on 7cf726a59435301046250c42131554d9ccc566b8]

url:    https://github.com/0day-ci/linux/commits/Daniel-Latypov/lib-add-basic-KUnit-test-for-lib-math/20201020-064737
base:    7cf726a59435301046250c42131554d9ccc566b8
config: mips-randconfig-r032-20201030 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project fa5a13276764a2657b3571fa3c57b07ee5d2d661)
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
        # install mips cross compiling tool for clang build
        # apt-get install binutils-mips-linux-gnu
        # https://github.com/0day-ci/linux/commit/e268c8ae297dc311e5deb6b25daad9a2f88309ba
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Daniel-Latypov/lib-add-basic-KUnit-test-for-lib-math/20201020-064737
        git checkout e268c8ae297dc311e5deb6b25daad9a2f88309ba
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> lib/math/math_test.c:137:13: warning: shift count >= width of type [-Wshift-count-overflow]
                           .a = 1UL >> 32,
                                    ^  ~~
   1 warning generated.

vim +137 lib/math/math_test.c

   109	
   110	static void int_sqrt_test(struct kunit *test)
   111	{
   112		const char *message_fmt = "sqrt(%lu)";
   113		int i;
   114	
   115		struct test_case test_cases[] = {
   116			{
   117				.a = 0,
   118				.result = 0,
   119			},
   120			{
   121				.a = 1,
   122				.result = 1,
   123			},
   124			{
   125				.a = 4,
   126				.result = 2,
   127			},
   128			{
   129				.a = 5,
   130				.result = 2,
   131			},
   132			{
   133				.a = 8,
   134				.result = 2,
   135			},
   136			{
 > 137				.a = 1UL >> 32,
   138				.result = 1UL >> 16,
   139			},
   140		};
   141	
   142		for (i = 0; i < ARRAY_SIZE(test_cases); ++i) {
   143			KUNIT_EXPECT_EQ_MSG(test, int_sqrt(test_cases[i].a),
   144					    test_cases[i].result, message_fmt,
   145					    test_cases[i].a);
   146		}
   147	}
   148	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Download attachment ".config.gz" of type "application/gzip" (27135 bytes)