Re: [PATCH v3] hwmon: Add T2 Mac fan control support in applesmc driver

Re: [PATCH v3] hwmon: Add T2 Mac fan control support in applesmc driver

[kernel test robot]

Hi Atharva,

kernel test robot noticed the following build errors:

[auto build test ERROR on groeck-staging/hwmon-next]
[also build test ERROR on linus/master v6.13-rc7 next-20250113]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Atharva-Tiwari/hwmon-Add-T2-Mac-fan-control-support-in-applesmc-driver/20250113-164741
base:   https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next
patch link:    https://lore.kernel.org/r/20250113084503.228037-1-evepolonium%40gmail.com
patch subject: [PATCH v3] hwmon: Add T2 Mac fan control support in applesmc driver
config: i386-buildonly-randconfig-002-20250114 (https://download.01.org/0day-ci/archive/20250114/202501140359.tA17RgoT-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250114/202501140359.tA17RgoT-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202501140359.tA17RgoT-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/hwmon/applesmc.c:517:12: error: call to undeclared function 'FIELD_GET'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     517 |         u8 sign = FIELD_GET(BIT(31), d);
         |                   ^
>> drivers/hwmon/applesmc.c:536:9: error: call to undeclared function 'FIELD_PREP'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     536 |         return FIELD_PREP(BIT_MASK(8) << 23, exp) |
         |                ^
   2 errors generated.


vim +/FIELD_GET +517 drivers/hwmon/applesmc.c

   514	
   515	static inline u32 applesmc_float_to_u32(u32 d)
   516	{
 > 517		u8 sign = FIELD_GET(BIT(31), d);
   518		s32 exp = FIELD_GET(BIT_MASK(8) << 23, d) - 0x7F;
   519		u32 fr = d & ((1u << 23) - 1);
   520	
   521		if (sign || exp < 0)
   522			return 0;
   523	
   524		return BIT(exp) + (fr >> (23 - exp));
   525	}
   526	
   527	static inline u32 applesmc_u32_to_float(u32 d)
   528	{
   529		u32 dc = d, bc = 0, exp;
   530	
   531		if (!d)
   532			return 0;
   533		while (dc >>= 1)
   534			++bc;
   535		exp = 0x7F + bc;
 > 536		return FIELD_PREP(BIT_MASK(8) << 23, exp) |
   537				(d << (23 - (exp - 0x7F)) & BIT_MASK(23));
   538	

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