Re: [PATCH v4 6/6] kselftest: alloc_tag: extend the allocinfo ioctl kselftest

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

Hi Suren,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]
[also build test ERROR on next-20260609]
[cannot apply to akpm-mm/mm-nonmm-unstable shuah-kselftest/next shuah-kselftest/fixes linus/master v7.1-rc7]
[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/Abhishek-Bapat/alloc_tag-add-ioctl-to-proc-allocinfo/20260610-081508
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/d0a8308b4d0799876d24461a8ed9b5a71d3e1e89.1781042698.git.abhishekbapat%40google.com
patch subject: [PATCH v4 6/6] kselftest: alloc_tag: extend the allocinfo ioctl kselftest
config: sparc64-randconfig-r061-20260610 (https://download.01.org/0day-ci/archive/20260611/202606110300.R4LPBVBO-lkp@intel.com/config)
compiler: sparc64-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260611/202606110300.R4LPBVBO-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/202606110300.R4LPBVBO-lkp@intel.com/

All errors (new ones prefixed by >>):

   lib/alloc_tag.c: In function 'allocinfo_compat_ioctl':
>> lib/alloc_tag.c:346:58: error: implicit declaration of function 'compat_ptr' [-Wimplicit-function-declaration]
     346 |         return allocinfo_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
         |                                                          ^~~~~~~~~~


vim +/compat_ptr +346 lib/alloc_tag.c

   341	
   342	#ifdef CONFIG_COMPAT
   343	static long allocinfo_compat_ioctl(struct file *file, unsigned int cmd,
   344					   unsigned long arg)
   345	{
 > 346		return allocinfo_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
   347	}
   348	#endif
   349	

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