[axboe-block:for-6.15/io_uring-reg-vec 5/12] io_uring/rsrc.c:1266:2: error: call to '__compiletime_assert_555' declared with 'error' attribute: BUILD_BUG_ON failed: sizeof(struct bio_vec) > sizeof(struct iovec)

[axboe-block:for-6.15/io_uring-reg-vec 5/12] io_uring/rsrc.c:1266:2: error: call to '__compiletime_assert_555' declared with 'error' attribute: BUILD_BUG_ON failed: sizeof(struct bio_vec) > sizeof(struct iovec)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-6.15/io_uring-reg-vec
head:   dbc5b236b665e61bc206055f8a6d45766fbec974
commit: 0b9406095d9d362ec0113e645380ac15302cd43c [5/12] io_uring: add infra for importing vectored reg buffers
config: arm-randconfig-004-20250306 (https://download.01.org/0day-ci/archive/20250307/202503070201.nEVRL9BJ-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250307/202503070201.nEVRL9BJ-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/202503070201.nEVRL9BJ-lkp@intel.com/

All errors (new ones prefixed by >>):

>> io_uring/rsrc.c:1266:2: error: call to '__compiletime_assert_555' declared with 'error' attribute: BUILD_BUG_ON failed: sizeof(struct bio_vec) > sizeof(struct iovec)
    1266 |         BUILD_BUG_ON(sizeof(struct bio_vec) > sizeof(struct iovec));
         |         ^
   include/linux/build_bug.h:50:2: note: expanded from macro 'BUILD_BUG_ON'
      50 |         BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
         |         ^
   include/linux/build_bug.h:39:37: note: expanded from macro 'BUILD_BUG_ON_MSG'
      39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
         |                                     ^
   include/linux/compiler_types.h:542:2: note: expanded from macro 'compiletime_assert'
     542 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |         ^
   include/linux/compiler_types.h:530:2: note: expanded from macro '_compiletime_assert'
     530 |         __compiletime_assert(condition, msg, prefix, suffix)
         |         ^
   include/linux/compiler_types.h:523:4: note: expanded from macro '__compiletime_assert'
     523 |                         prefix ## suffix();                             \
         |                         ^
   <scratch space>:14:1: note: expanded from here
      14 | __compiletime_assert_555
         | ^
>> io_uring/rsrc.c:1266:2: error: call to '__compiletime_assert_555' declared with 'error' attribute: BUILD_BUG_ON failed: sizeof(struct bio_vec) > sizeof(struct iovec)
   include/linux/build_bug.h:50:2: note: expanded from macro 'BUILD_BUG_ON'
      50 |         BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
         |         ^
   include/linux/build_bug.h:39:37: note: expanded from macro 'BUILD_BUG_ON_MSG'
      39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
         |                                     ^
   include/linux/compiler_types.h:542:2: note: expanded from macro 'compiletime_assert'
     542 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |         ^
   include/linux/compiler_types.h:530:2: note: expanded from macro '_compiletime_assert'
     530 |         __compiletime_assert(condition, msg, prefix, suffix)
         |         ^
   include/linux/compiler_types.h:523:4: note: expanded from macro '__compiletime_assert'
     523 |                         prefix ## suffix();                             \
         |                         ^
   <scratch space>:14:1: note: expanded from here
      14 | __compiletime_assert_555
         | ^
>> io_uring/rsrc.c:1266:2: error: call to '__compiletime_assert_555' declared with 'error' attribute: BUILD_BUG_ON failed: sizeof(struct bio_vec) > sizeof(struct iovec)
   include/linux/build_bug.h:50:2: note: expanded from macro 'BUILD_BUG_ON'
      50 |         BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
         |         ^
   include/linux/build_bug.h:39:37: note: expanded from macro 'BUILD_BUG_ON_MSG'
      39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
         |                                     ^
   include/linux/compiler_types.h:542:2: note: expanded from macro 'compiletime_assert'
     542 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |         ^
   include/linux/compiler_types.h:530:2: note: expanded from macro '_compiletime_assert'
     530 |         __compiletime_assert(condition, msg, prefix, suffix)
         |         ^
   include/linux/compiler_types.h:523:4: note: expanded from macro '__compiletime_assert'
     523 |                         prefix ## suffix();                             \
         |                         ^
   <scratch space>:14:1: note: expanded from here
      14 | __compiletime_assert_555
         | ^
   3 errors generated.


vim +1266 io_uring/rsrc.c

  1263	
  1264	void io_vec_free(struct iou_vec *iv)
  1265	{
> 1266		BUILD_BUG_ON(sizeof(struct bio_vec) > sizeof(struct iovec));
  1267	
  1268		if (!iv->iovec)
  1269			return;
  1270		kfree(iv->iovec);
  1271		iv->iovec = NULL;
  1272		iv->nr = 0;
  1273	}
  1274	

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