[scosu-sched:topic/mmap-cap-prot-wip/v6.18 11/1130] usr/include/linux/atmapi.h:29:25: error: use of undeclared identifier '__u64ptr'

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

tree:   https://github.com/scosu/linux-sched topic/mmap-cap-prot-wip/v6.18
head:   f69a5a9d9fee15edde28429e23a4c749a59937bd
commit: d7248704a9e61a04dbe3289ba19e99273d16504e [11/1130] cheri: UAPI: Make sure we can store a user pointer in atm_kptr_t
config: s390-allmodconfig (https://download.01.org/0day-ci/archive/20260522/202605220741.ysVbhmII-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260522/202605220741.ysVbhmII-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/202605220741.ysVbhmII-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from <built-in>:1:
   In file included from ./usr/include/linux/atmlec.h:11:
>> usr/include/linux/atmapi.h:29:25: error: use of undeclared identifier '__u64ptr'
      29 |         unsigned char _[sizeof(__u64ptr)];
         |                                ^
>> usr/include/linux/atmapi.h:30:2: error: expected ';' after struct
      30 | } __ATM_API_ALIGN __CHERI_POINTER_ALIGN atm_kptr_t;
         |  ^
>> usr/include/linux/atmapi.h:30:19: error: unknown type name '__CHERI_POINTER_ALIGN'
      30 | } __ATM_API_ALIGN __CHERI_POINTER_ALIGN atm_kptr_t;
         |                   ^
   3 errors generated.
--
   In file included from <built-in>:1:
>> ./usr/include/linux/atmapi.h:29:25: error: use of undeclared identifier '__u64ptr'
      29 |         unsigned char _[sizeof(__u64ptr)];
         |                                ^
>> ./usr/include/linux/atmapi.h:30:2: error: expected ';' after struct
      30 | } __ATM_API_ALIGN __CHERI_POINTER_ALIGN atm_kptr_t;
         |  ^
>> ./usr/include/linux/atmapi.h:30:19: error: unknown type name '__CHERI_POINTER_ALIGN'
      30 | } __ATM_API_ALIGN __CHERI_POINTER_ALIGN atm_kptr_t;
         |                   ^
   3 errors generated.

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