fs/eventpoll.o: warning: objtool: ep_poll_callback+0xf8: unreachable instruction

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

Hi Sean,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   a86bf2283d2c9769205407e2b54777c03d012939
commit: fe42754b94a42d08cf9501790afc25c4f6a5f631 cpu: Re-enable CPU mitigations by default for !X86 architectures
date:   9 months ago
config: x86_64-allnoconfig (https://download.01.org/0day-ci/archive/20250202/202502021723.9TTa7Wzt-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250202/202502021723.9TTa7Wzt-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/202502021723.9TTa7Wzt-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from fs/eventpoll.c:16:
   In file included from include/linux/mm.h:2208:
   include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     522 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   1 warning generated.
>> fs/eventpoll.o: warning: objtool: ep_poll_callback+0xf8: unreachable instruction

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