Re: [PATCH 1/2] befs: Add FS_IOC_GETFSLABEL ioctl

[kernel test robot <lkp@intel.com>]

Hi Ethan,

kernel test robot noticed the following build errors:

[auto build test ERROR on 541c43310e85dbf35368b43b720c6724bc8ad8ec]

url:    https://github.com/intel-lab-lkp/linux/commits/Ethan-Ferguson/befs-Add-FS_IOC_GETFSLABEL-ioctl/20260213-071516
base:   541c43310e85dbf35368b43b720c6724bc8ad8ec
patch link:    https://lore.kernel.org/r/20260212231339.644714-2-ethan.ferguson%40zetier.com
patch subject: [PATCH 1/2] befs: Add FS_IOC_GETFSLABEL ioctl
config: sparc64-allmodconfig (https://download.01.org/0day-ci/archive/20260213/202602131600.jVbNpmdD-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 9b8addffa70cee5b2acc5454712d9cf78ce45710)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260213/202602131600.jVbNpmdD-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/202602131600.jVbNpmdD-lkp@intel.com/

All errors (new ones prefixed by >>):

>> fs/befs/linuxvfs.c:985:54: error: call to undeclared function 'compat_ptr'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     985 |         return befs_generic_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
         |                                                             ^
   1 error generated.


vim +/compat_ptr +985 fs/befs/linuxvfs.c

   979	
   980	#ifdef CONFIG_COMPAT
   981	static long befs_generic_compat_ioctl(struct file *filp, unsigned int cmd,
   982					      unsigned long arg)
   983	
   984	{
 > 985		return befs_generic_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
   986	}
   987	#endif
   988	

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