[jj-apparmor:apparmor-next 4/4] security/apparmor/af_unix.c:604:3: error: call to undeclared function 'unix_state_lock_nested'; ISO C99 and later do not support implicit function declarations

[jj-apparmor:apparmor-next 4/4] security/apparmor/af_unix.c:604:3: error: call to undeclared function 'unix_state_lock_nested'; ISO C99 and later do not support implicit function declarations

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor.git apparmor-next
head:   e6b2ff78a1aeb16f290e483536dedf626ba2d1e9
commit: e6b2ff78a1aeb16f290e483536dedf626ba2d1e9 [4/4] apparmor: add fine grained af_unix mediation
config: i386-buildonly-randconfig-004-20240730 (https://download.01.org/0day-ci/archive/20240730/202407300828.EbdfjLX0-lkp@intel.com/config)
compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240730/202407300828.EbdfjLX0-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/202407300828.EbdfjLX0-lkp@intel.com/

All errors (new ones prefixed by >>):

>> security/apparmor/af_unix.c:604:3: error: call to undeclared function 'unix_state_lock_nested'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     604 |                 unix_state_lock_nested(sk2, U_LOCK_SECOND);
         |                 ^
>> security/apparmor/af_unix.c:604:31: error: use of undeclared identifier 'U_LOCK_SECOND'
     604 |                 unix_state_lock_nested(sk2, U_LOCK_SECOND);
         |                                             ^
   security/apparmor/af_unix.c:607:3: error: call to undeclared function 'unix_state_lock_nested'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     607 |                 unix_state_lock_nested(sk1, U_LOCK_SECOND);
         |                 ^
   security/apparmor/af_unix.c:607:31: error: use of undeclared identifier 'U_LOCK_SECOND'
     607 |                 unix_state_lock_nested(sk1, U_LOCK_SECOND);
         |                                             ^
   4 errors generated.


vim +/unix_state_lock_nested +604 security/apparmor/af_unix.c

   595	
   596	static void unix_state_double_lock(struct sock *sk1, struct sock *sk2)
   597	{
   598		if (unlikely(sk1 == sk2) || !sk2) {
   599			unix_state_lock(sk1);
   600			return;
   601		}
   602		if (sk1 < sk2) {
   603			unix_state_lock(sk1);
 > 604			unix_state_lock_nested(sk2, U_LOCK_SECOND);
   605		} else {
   606			unix_state_lock(sk2);
   607			unix_state_lock_nested(sk1, U_LOCK_SECOND);
   608		}
   609	}
   610	

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