[broonie-ci:arm64-gcs 27/40] arch/arm64/kernel/ptrace.c:1472:1: warning: non-void function does not return a value in all control paths

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/ci.git arm64-gcs
head:   da6c19766d3399121d0f97a5dcf38de9e315ec9b
commit: ef0e2d1b9c3ffcc89d29b948024b0803cc59b53a [27/40] arm64/ptrace: Expose GCS via ptrace and core files
config: arm64-randconfig-001-20240930 (https://download.01.org/0day-ci/archive/20240930/202409301807.bMALFYf7-lkp@intel.com/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 7773243d9916f98ba0ffce0c3a960e4aa9f03e81)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240930/202409301807.bMALFYf7-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/202409301807.bMALFYf7-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from arch/arm64/kernel/ptrace.c:11:
   In file included from include/linux/audit.h:13:
   In file included from include/linux/ptrace.h:10:
   In file included from include/linux/pid_namespace.h:7:
   In file included from include/linux/mm.h:2223:
   include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     518 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
>> arch/arm64/kernel/ptrace.c:1472:1: warning: non-void function does not return a value in all control paths [-Wreturn-type]
    1472 | }
         | ^
   2 warnings generated.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for MODVERSIONS
   Depends on [n]: MODULES [=y] && !COMPILE_TEST [=y]
   Selected by [y]:
   - RANDSTRUCT_FULL [=y] && (CC_HAS_RANDSTRUCT [=y] || GCC_PLUGINS [=n]) && MODULES [=y]


vim +1472 arch/arm64/kernel/ptrace.c

  1455	
  1456	static int poe_set(struct task_struct *target, const struct
  1457			   user_regset *regset, unsigned int pos,
  1458			   unsigned int count, const void *kbuf, const
  1459			   void __user *ubuf)
  1460	{
  1461		int ret;
  1462		long ctrl;
  1463	
  1464		if (!system_supports_poe())
  1465			return -EINVAL;
  1466	
  1467		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &ctrl, 0, -1);
  1468		if (ret)
  1469			return ret;
  1470	
  1471		target->thread.por_el0 = ctrl;
> 1472	}
  1473	#endif
  1474	

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