Re: [PATCH v4 19/25] fuse: add io-uring kernel-managed buffer ring

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

Hi Joanne,

kernel test robot noticed the following build warnings:

[auto build test WARNING on axboe/for-next]
[also build test WARNING on mszeredi-fuse/for-next linus/master v6.19-rc5 next-20260116]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Joanne-Koong/io_uring-kbuf-refactor-io_buf_pbuf_register-logic-into-generic-helpers/20260117-073512
base:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux.git for-next
patch link:    https://lore.kernel.org/r/20260116233044.1532965-20-joannelkoong%40gmail.com
patch subject: [PATCH v4 19/25] fuse: add io-uring kernel-managed buffer ring
config: sh-randconfig-001-20260117 (https://download.01.org/0day-ci/archive/20260117/202601171304.uwDzXWzy-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260117/202601171304.uwDzXWzy-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/202601171304.uwDzXWzy-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from arch/sh/include/asm/bug.h:112,
                    from include/linux/bug.h:5,
                    from include/linux/random.h:6,
                    from include/linux/nodemask.h:94,
                    from include/linux/list_lru.h:12,
                    from include/linux/fs/super_types.h:7,
                    from include/linux/fs/super.h:5,
                    from include/linux/fs.h:5,
                    from fs/fuse/fuse_i.h:17,
                    from fs/fuse/dev_uring.c:7:
   fs/fuse/dev_uring.c: In function 'fuse_uring_clean_up_buffer':
>> fs/fuse/dev_uring.c:926:10: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     926 |          (u64)kvec->iov_base, kvec->iov_len,
         |          ^
   include/asm-generic/bug.h:205:25: note: in definition of macro 'WARN_ON'
     205 |  int __ret_warn_on = !!(condition);    \
         |                         ^~~~~~~~~
   fs/fuse/dev_uring.c:925:2: note: in expansion of macro 'WARN_ON_ONCE'
     925 |  WARN_ON_ONCE(io_uring_kmbuf_recycle(ent->cmd, FUSE_URING_RINGBUF_GROUP,
         |  ^~~~~~~~~~~~


vim +926 fs/fuse/dev_uring.c

   913	
   914	static void fuse_uring_clean_up_buffer(struct fuse_ring_ent *ent,
   915					       unsigned int issue_flags)
   916		__must_hold(&queue->lock)
   917	{
   918		struct kvec *kvec = &ent->payload_kvec;
   919	
   920		lockdep_assert_held(&ent->queue->lock);
   921	
   922		if (!ent->queue->use_bufring || !kvec->iov_base)
   923			return;
   924	
   925		WARN_ON_ONCE(io_uring_kmbuf_recycle(ent->cmd, FUSE_URING_RINGBUF_GROUP,
 > 926						    (u64)kvec->iov_base, kvec->iov_len,
   927						    ent->ringbuf_buf_id, issue_flags));
   928	
   929		memset(kvec, 0, sizeof(*kvec));
   930	}
   931	

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