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Date:   Tue, 7 Jul 2020 02:14:38 +0800
From:   kernel test robot <lkp@...el.com>
To:     Murton Liu <murton.liu@....com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Alex Deucher <alexander.deucher@....com>,
        Aric Cyr <Aric.Cyr@....com>
Subject: drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/hw_generic.c:121:2:
 note: in expansion of macro 'if'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   5c82ec00dd00c7a2b02d4b42cf59ae87592cb75f
commit: d40605b6d088b20827e442903022c65f0f165c84 drm/amd/display: Implement generic MUX registers (v2)
date:   12 months ago
config: microblaze-randconfig-r022-20200706 (attached as .config)
compiler: microblaze-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
        git checkout d40605b6d088b20827e442903022c65f0f165c84
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=microblaze 

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 >>):

   In file included from include/asm-generic/bug.h:5,
                    from ./arch/microblaze/include/generated/asm/bug.h:1,
                    from include/linux/bug.h:5,
                    from include/linux/mmdebug.h:5,
                    from include/linux/gfp.h:5,
                    from include/linux/slab.h:15,
                    from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/hw_generic.c:26:
   drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/hw_generic.c: In function 'dal_hw_generic_create':
   drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/hw_generic.c:121:10: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits]
     121 |  if ((en < GPIO_GENERIC_MIN) || (en > GPIO_GENERIC_MAX)) {
         |          ^
   include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var'
      58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
         |                                                    ^~~~
>> drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/hw_generic.c:121:2: note: in expansion of macro 'if'
     121 |  if ((en < GPIO_GENERIC_MIN) || (en > GPIO_GENERIC_MAX)) {
         |  ^~
   drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/hw_generic.c:121:10: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits]
     121 |  if ((en < GPIO_GENERIC_MIN) || (en > GPIO_GENERIC_MAX)) {
         |          ^
   include/linux/compiler.h:58:61: note: in definition of macro '__trace_if_var'
      58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
         |                                                             ^~~~
>> drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/hw_generic.c:121:2: note: in expansion of macro 'if'
     121 |  if ((en < GPIO_GENERIC_MIN) || (en > GPIO_GENERIC_MAX)) {
         |  ^~
   drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/hw_generic.c:121:10: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits]
     121 |  if ((en < GPIO_GENERIC_MIN) || (en > GPIO_GENERIC_MAX)) {
         |          ^
   include/linux/compiler.h:69:3: note: in definition of macro '__trace_if_value'
      69 |  (cond) ?     \
         |   ^~~~
   include/linux/compiler.h:56:28: note: in expansion of macro '__trace_if_var'
      56 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
         |                            ^~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/hw_generic.c:121:2: note: in expansion of macro 'if'
     121 |  if ((en < GPIO_GENERIC_MIN) || (en > GPIO_GENERIC_MAX)) {
         |  ^~
   In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/dc_types.h:29,
                    from drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services_types.h:30,
                    from drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services.h:37,
                    from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/hw_generic.c:28:
   At top level:
   drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:76:32: warning: 'dc_fixpt_ln2_div_2' defined but not used [-Wunused-const-variable=]
      76 | static const struct fixed31_32 dc_fixpt_ln2_div_2 = { 1488522236LL };
         |                                ^~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:75:32: warning: 'dc_fixpt_ln2' defined but not used [-Wunused-const-variable=]
      75 | static const struct fixed31_32 dc_fixpt_ln2 = { 2977044471LL };
         |                                ^~~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:74:32: warning: 'dc_fixpt_e' defined but not used [-Wunused-const-variable=]
      74 | static const struct fixed31_32 dc_fixpt_e = { 11674931555LL };
         |                                ^~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:73:32: warning: 'dc_fixpt_two_pi' defined but not used [-Wunused-const-variable=]
      73 | static const struct fixed31_32 dc_fixpt_two_pi = { 26986075409LL };
         |                                ^~~~~~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:72:32: warning: 'dc_fixpt_pi' defined but not used [-Wunused-const-variable=]
      72 | static const struct fixed31_32 dc_fixpt_pi = { 13493037705LL };
         |                                ^~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:67:32: warning: 'dc_fixpt_zero' defined but not used [-Wunused-const-variable=]
      67 | static const struct fixed31_32 dc_fixpt_zero = { 0 };
         |                                ^~~~~~~~~~~~~

vim +/if +121 drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/hw_generic.c

   108	
   109	struct hw_gpio_pin *dal_hw_generic_create(
   110		struct dc_context *ctx,
   111		enum gpio_id id,
   112		uint32_t en)
   113	{
   114		struct hw_generic *generic;
   115	
   116		if (id != GPIO_ID_GENERIC) {
   117			ASSERT_CRITICAL(false);
   118			return NULL;
   119		}
   120	
 > 121		if ((en < GPIO_GENERIC_MIN) || (en > GPIO_GENERIC_MAX)) {

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

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