[axboe-block:io_uring-sendzc-provided 5/7] io_uring/io_uring.h:478:16: warning: cast to pointer from integer of different size

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git io_uring-sendzc-provided
head:   7bc33ee65a67c3434c7b4c75de90444bede2fd26
commit: f7f8888ac3a68a5c0a10b596b62757780149a0ce [5/7] io_uring/cancel: use LSB bit of req->imu for cancel_seq_set
config: openrisc-allnoconfig (https://download.01.org/0day-ci/archive/20241017/202410170250.WIwBreaN-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 14.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241017/202410170250.WIwBreaN-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/202410170250.WIwBreaN-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from io_uring/io_uring.c:82:
   io_uring/io_uring.h: In function 'req_imu':
>> io_uring/io_uring.h:478:16: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
     478 |         return (struct io_mapped_ubuf *) ((unsigned long) req->imu & ~1ULL);
         |                ^


vim +478 io_uring/io_uring.h

   473	
   474	static inline struct io_mapped_ubuf *req_imu(struct io_kiocb *req)
   475	{
   476		BUILD_BUG_ON(offsetof(struct io_kiocb, imu) !=
   477			     offsetof(struct io_kiocb, cancel_ptr));
 > 478		return (struct io_mapped_ubuf *) ((unsigned long) req->imu & ~1ULL);

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