io_uring/register.c:553:1: sparse: sparse: Using plain integer as NULL pointer

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   6efbea77b390604a7be7364583e19cd2d6a1291b
commit: c43203154d8ac579537aa0c7802b77d463b1f53a io_uring/register: move io_uring_register(2) related code to register.c
date:   10 months ago
config: s390-randconfig-r123-20241017 (https://download.01.org/0day-ci/archive/20241018/202410181226.op9CSaKK-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 14.1.0
reproduce: (https://download.01.org/0day-ci/archive/20241018/202410181226.op9CSaKK-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/202410181226.op9CSaKK-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   io_uring/register.c: note: in included file:
   include/linux/io_uring_types.h:341:48: sparse: sparse: array of flexible structures
>> io_uring/register.c:553:1: sparse: sparse: Using plain integer as NULL pointer
>> io_uring/register.c:553:1: sparse: sparse: Using plain integer as NULL pointer

vim +553 io_uring/register.c

   552	
 > 553	SYSCALL_DEFINE4(io_uring_register, unsigned int, fd, unsigned int, opcode,

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