Re: [PATCH 1/2] block: Use struct_size() helper in kmalloc()

[kernel test robot]

Hi luoqing,

kernel test robot noticed the following build errors:

[auto build test ERROR on axboe/for-next]
[also build test ERROR on device-mapper-dm/for-next linus/master v7.0-rc2 next-20260306]
[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/luoqing/dm-bufio-Use-struct_size-helper-in-kmalloc/20260306-165625
base:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux.git for-next
patch link:    https://lore.kernel.org/r/20260306080056.1262324-1-l1138897701%40163.com
patch subject: [PATCH 1/2] block: Use struct_size() helper in kmalloc()
config: alpha-allnoconfig (https://download.01.org/0day-ci/archive/20260307/202603070229.0LteZRkh-lkp@xxxxxxxxx/config)
compiler: alpha-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260307/202603070229.0LteZRkh-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202603070229.0LteZRkh-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

   In file included from include/linux/workqueue.h:9,
                    from include/linux/mm_types.h:19,
                    from include/linux/mmzone.h:22,
                    from include/linux/gfp.h:7,
                    from include/linux/mm.h:8,
                    from block/bio.c:5:
   block/bio.c: In function 'bio_kmalloc':
>> block/bio.c:660:41: error: 'struct bio' has no member named 'bio_vec'; did you mean 'bi_io_vec'?
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                                         ^~~~~~~
   include/linux/alloc_tag.h:251:16: note: in definition of macro 'alloc_hooks_tag'
     251 |         typeof(_do_alloc) _res;                                         \
         |                ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/overflow.h:436:32: note: in expansion of macro 'flex_array_size'
     436 |                 sizeof(*(p)) + flex_array_size(p, member, count),       \
         |                                ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
>> block/bio.c:660:41: error: 'struct bio' has no member named 'bio_vec'; did you mean 'bi_io_vec'?
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                                         ^~~~~~~
   include/linux/alloc_tag.h:251:16: note: in definition of macro 'alloc_hooks_tag'
     251 |         typeof(_do_alloc) _res;                                         \
         |                ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/compiler.h:208:33: note: in expansion of macro '__BUILD_BUG_ON_ZERO_MSG'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:207:35: note: in expansion of macro '__same_type'
     207 | #define __is_array(a)           (!__same_type((a), &(a)[0]))
         |                                   ^~~~~~~~~~~
   include/linux/compiler.h:208:58: note: in expansion of macro '__is_array'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                                          ^~~~~~~~~~
   include/linux/overflow.h:420:50: note: in expansion of macro '__must_be_array'
     420 |                 (count) * sizeof(*(p)->member) + __must_be_array((p)->member),  \
         |                                                  ^~~~~~~~~~~~~~~
   include/linux/overflow.h:436:32: note: in expansion of macro 'flex_array_size'
     436 |                 sizeof(*(p)) + flex_array_size(p, member, count),       \
         |                                ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
>> block/bio.c:660:41: error: 'struct bio' has no member named 'bio_vec'; did you mean 'bi_io_vec'?
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                                         ^~~~~~~
   include/linux/alloc_tag.h:251:16: note: in definition of macro 'alloc_hooks_tag'
     251 |         typeof(_do_alloc) _res;                                         \
         |                ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/compiler.h:208:33: note: in expansion of macro '__BUILD_BUG_ON_ZERO_MSG'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:207:35: note: in expansion of macro '__same_type'
     207 | #define __is_array(a)           (!__same_type((a), &(a)[0]))
         |                                   ^~~~~~~~~~~
   include/linux/compiler.h:208:58: note: in expansion of macro '__is_array'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                                          ^~~~~~~~~~
   include/linux/overflow.h:420:50: note: in expansion of macro '__must_be_array'
     420 |                 (count) * sizeof(*(p)->member) + __must_be_array((p)->member),  \
         |                                                  ^~~~~~~~~~~~~~~
   include/linux/overflow.h:436:32: note: in expansion of macro 'flex_array_size'
     436 |                 sizeof(*(p)) + flex_array_size(p, member, count),       \
         |                                ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
>> include/linux/compiler.h:203:82: error: expression in static assertion is not an integer
     203 | #define __BUILD_BUG_ON_ZERO_MSG(e, msg, ...) ((int)sizeof(struct {_Static_assert(!(e), msg);}))
         |                                                                                  ^
   include/linux/alloc_tag.h:251:16: note: in definition of macro 'alloc_hooks_tag'
     251 |         typeof(_do_alloc) _res;                                         \
         |                ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/compiler.h:208:33: note: in expansion of macro '__BUILD_BUG_ON_ZERO_MSG'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/overflow.h:420:50: note: in expansion of macro '__must_be_array'
     420 |                 (count) * sizeof(*(p)->member) + __must_be_array((p)->member),  \
         |                                                  ^~~~~~~~~~~~~~~
   include/linux/overflow.h:436:32: note: in expansion of macro 'flex_array_size'
     436 |                 sizeof(*(p)) + flex_array_size(p, member, count),       \
         |                                ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
>> block/bio.c:660:41: error: 'struct bio' has no member named 'bio_vec'; did you mean 'bi_io_vec'?
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                                         ^~~~~~~
   include/linux/alloc_tag.h:251:16: note: in definition of macro 'alloc_hooks_tag'
     251 |         typeof(_do_alloc) _res;                                         \
         |                ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/overflow.h:436:32: note: in expansion of macro 'flex_array_size'
     436 |                 sizeof(*(p)) + flex_array_size(p, member, count),       \
         |                                ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
>> block/bio.c:660:41: error: 'struct bio' has no member named 'bio_vec'; did you mean 'bi_io_vec'?
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                                         ^~~~~~~
   include/linux/alloc_tag.h:251:16: note: in definition of macro 'alloc_hooks_tag'
     251 |         typeof(_do_alloc) _res;                                         \
         |                ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/compiler.h:208:33: note: in expansion of macro '__BUILD_BUG_ON_ZERO_MSG'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:207:35: note: in expansion of macro '__same_type'
     207 | #define __is_array(a)           (!__same_type((a), &(a)[0]))
         |                                   ^~~~~~~~~~~
   include/linux/compiler.h:208:58: note: in expansion of macro '__is_array'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                                          ^~~~~~~~~~
   include/linux/overflow.h:421:56: note: in expansion of macro '__must_be_array'
     421 |                 size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
         |                                                        ^~~~~~~~~~~~~~~
   include/linux/overflow.h:436:32: note: in expansion of macro 'flex_array_size'
     436 |                 sizeof(*(p)) + flex_array_size(p, member, count),       \
         |                                ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
>> block/bio.c:660:41: error: 'struct bio' has no member named 'bio_vec'; did you mean 'bi_io_vec'?
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                                         ^~~~~~~
   include/linux/alloc_tag.h:251:16: note: in definition of macro 'alloc_hooks_tag'
     251 |         typeof(_do_alloc) _res;                                         \
         |                ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/compiler.h:208:33: note: in expansion of macro '__BUILD_BUG_ON_ZERO_MSG'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:207:35: note: in expansion of macro '__same_type'
     207 | #define __is_array(a)           (!__same_type((a), &(a)[0]))
         |                                   ^~~~~~~~~~~
   include/linux/compiler.h:208:58: note: in expansion of macro '__is_array'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                                          ^~~~~~~~~~
   include/linux/overflow.h:421:56: note: in expansion of macro '__must_be_array'
     421 |                 size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
         |                                                        ^~~~~~~~~~~~~~~
   include/linux/overflow.h:436:32: note: in expansion of macro 'flex_array_size'
     436 |                 sizeof(*(p)) + flex_array_size(p, member, count),       \
         |                                ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
>> include/linux/compiler.h:203:82: error: expression in static assertion is not an integer
     203 | #define __BUILD_BUG_ON_ZERO_MSG(e, msg, ...) ((int)sizeof(struct {_Static_assert(!(e), msg);}))
         |                                                                                  ^
   include/linux/alloc_tag.h:251:16: note: in definition of macro 'alloc_hooks_tag'
     251 |         typeof(_do_alloc) _res;                                         \
         |                ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/compiler.h:208:33: note: in expansion of macro '__BUILD_BUG_ON_ZERO_MSG'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/overflow.h:421:56: note: in expansion of macro '__must_be_array'
     421 |                 size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
         |                                                        ^~~~~~~~~~~~~~~
   include/linux/overflow.h:436:32: note: in expansion of macro 'flex_array_size'
     436 |                 sizeof(*(p)) + flex_array_size(p, member, count),       \
         |                                ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
>> block/bio.c:660:41: error: 'struct bio' has no member named 'bio_vec'; did you mean 'bi_io_vec'?
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                                         ^~~~~~~
   include/linux/alloc_tag.h:251:16: note: in definition of macro 'alloc_hooks_tag'
     251 |         typeof(_do_alloc) _res;                                         \
         |                ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/overflow.h:437:40: note: in expansion of macro 'flex_array_size'
     437 |                 size_add(sizeof(*(p)), flex_array_size(p, member, count)))
         |                                        ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
>> block/bio.c:660:41: error: 'struct bio' has no member named 'bio_vec'; did you mean 'bi_io_vec'?
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                                         ^~~~~~~
   include/linux/alloc_tag.h:251:16: note: in definition of macro 'alloc_hooks_tag'
     251 |         typeof(_do_alloc) _res;                                         \
         |                ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/compiler.h:208:33: note: in expansion of macro '__BUILD_BUG_ON_ZERO_MSG'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:207:35: note: in expansion of macro '__same_type'
     207 | #define __is_array(a)           (!__same_type((a), &(a)[0]))
         |                                   ^~~~~~~~~~~
   include/linux/compiler.h:208:58: note: in expansion of macro '__is_array'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                                          ^~~~~~~~~~
   include/linux/overflow.h:420:50: note: in expansion of macro '__must_be_array'
     420 |                 (count) * sizeof(*(p)->member) + __must_be_array((p)->member),  \
         |                                                  ^~~~~~~~~~~~~~~
   include/linux/overflow.h:437:40: note: in expansion of macro 'flex_array_size'
     437 |                 size_add(sizeof(*(p)), flex_array_size(p, member, count)))
         |                                        ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
>> block/bio.c:660:41: error: 'struct bio' has no member named 'bio_vec'; did you mean 'bi_io_vec'?
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                                         ^~~~~~~
   include/linux/alloc_tag.h:251:16: note: in definition of macro 'alloc_hooks_tag'
     251 |         typeof(_do_alloc) _res;                                         \
         |                ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/compiler.h:208:33: note: in expansion of macro '__BUILD_BUG_ON_ZERO_MSG'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:207:35: note: in expansion of macro '__same_type'
     207 | #define __is_array(a)           (!__same_type((a), &(a)[0]))
         |                                   ^~~~~~~~~~~
   include/linux/compiler.h:208:58: note: in expansion of macro '__is_array'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                                          ^~~~~~~~~~
   include/linux/overflow.h:420:50: note: in expansion of macro '__must_be_array'
     420 |                 (count) * sizeof(*(p)->member) + __must_be_array((p)->member),  \
         |                                                  ^~~~~~~~~~~~~~~
   include/linux/overflow.h:437:40: note: in expansion of macro 'flex_array_size'
     437 |                 size_add(sizeof(*(p)), flex_array_size(p, member, count)))
         |                                        ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
>> include/linux/compiler.h:203:82: error: expression in static assertion is not an integer
     203 | #define __BUILD_BUG_ON_ZERO_MSG(e, msg, ...) ((int)sizeof(struct {_Static_assert(!(e), msg);}))
         |                                                                                  ^
   include/linux/alloc_tag.h:251:16: note: in definition of macro 'alloc_hooks_tag'
     251 |         typeof(_do_alloc) _res;                                         \
         |                ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/compiler.h:208:33: note: in expansion of macro '__BUILD_BUG_ON_ZERO_MSG'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/overflow.h:420:50: note: in expansion of macro '__must_be_array'
     420 |                 (count) * sizeof(*(p)->member) + __must_be_array((p)->member),  \
         |                                                  ^~~~~~~~~~~~~~~
   include/linux/overflow.h:437:40: note: in expansion of macro 'flex_array_size'
     437 |                 size_add(sizeof(*(p)), flex_array_size(p, member, count)))
         |                                        ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
>> block/bio.c:660:41: error: 'struct bio' has no member named 'bio_vec'; did you mean 'bi_io_vec'?
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                                         ^~~~~~~
   include/linux/alloc_tag.h:251:16: note: in definition of macro 'alloc_hooks_tag'
     251 |         typeof(_do_alloc) _res;                                         \
         |                ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/overflow.h:437:40: note: in expansion of macro 'flex_array_size'
     437 |                 size_add(sizeof(*(p)), flex_array_size(p, member, count)))
         |                                        ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
>> block/bio.c:660:41: error: 'struct bio' has no member named 'bio_vec'; did you mean 'bi_io_vec'?
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                                         ^~~~~~~
   include/linux/alloc_tag.h:251:16: note: in definition of macro 'alloc_hooks_tag'
     251 |         typeof(_do_alloc) _res;                                         \
         |                ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/compiler.h:208:33: note: in expansion of macro '__BUILD_BUG_ON_ZERO_MSG'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:207:35: note: in expansion of macro '__same_type'
     207 | #define __is_array(a)           (!__same_type((a), &(a)[0]))
         |                                   ^~~~~~~~~~~
   include/linux/compiler.h:208:58: note: in expansion of macro '__is_array'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                                          ^~~~~~~~~~
   include/linux/overflow.h:421:56: note: in expansion of macro '__must_be_array'
     421 |                 size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
         |                                                        ^~~~~~~~~~~~~~~
   include/linux/overflow.h:437:40: note: in expansion of macro 'flex_array_size'
     437 |                 size_add(sizeof(*(p)), flex_array_size(p, member, count)))
         |                                        ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
>> block/bio.c:660:41: error: 'struct bio' has no member named 'bio_vec'; did you mean 'bi_io_vec'?
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                                         ^~~~~~~
   include/linux/alloc_tag.h:251:16: note: in definition of macro 'alloc_hooks_tag'
     251 |         typeof(_do_alloc) _res;                                         \
         |                ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/compiler.h:208:33: note: in expansion of macro '__BUILD_BUG_ON_ZERO_MSG'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:207:35: note: in expansion of macro '__same_type'
     207 | #define __is_array(a)           (!__same_type((a), &(a)[0]))
         |                                   ^~~~~~~~~~~
   include/linux/compiler.h:208:58: note: in expansion of macro '__is_array'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                                          ^~~~~~~~~~
   include/linux/overflow.h:421:56: note: in expansion of macro '__must_be_array'
     421 |                 size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
         |                                                        ^~~~~~~~~~~~~~~
   include/linux/overflow.h:437:40: note: in expansion of macro 'flex_array_size'
     437 |                 size_add(sizeof(*(p)), flex_array_size(p, member, count)))
         |                                        ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
>> include/linux/compiler.h:203:82: error: expression in static assertion is not an integer
     203 | #define __BUILD_BUG_ON_ZERO_MSG(e, msg, ...) ((int)sizeof(struct {_Static_assert(!(e), msg);}))
         |                                                                                  ^
   include/linux/alloc_tag.h:251:16: note: in definition of macro 'alloc_hooks_tag'
     251 |         typeof(_do_alloc) _res;                                         \
         |                ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/compiler.h:208:33: note: in expansion of macro '__BUILD_BUG_ON_ZERO_MSG'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/overflow.h:421:56: note: in expansion of macro '__must_be_array'
     421 |                 size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
         |                                                        ^~~~~~~~~~~~~~~
   include/linux/overflow.h:437:40: note: in expansion of macro 'flex_array_size'
     437 |                 size_add(sizeof(*(p)), flex_array_size(p, member, count)))
         |                                        ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
>> block/bio.c:660:41: error: 'struct bio' has no member named 'bio_vec'; did you mean 'bi_io_vec'?
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                                         ^~~~~~~
   include/linux/alloc_tag.h:255:24: note: in definition of macro 'alloc_hooks_tag'
     255 |                 _res = _do_alloc;                                       \
         |                        ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/overflow.h:436:32: note: in expansion of macro 'flex_array_size'
     436 |                 sizeof(*(p)) + flex_array_size(p, member, count),       \
         |                                ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
>> block/bio.c:660:41: error: 'struct bio' has no member named 'bio_vec'; did you mean 'bi_io_vec'?
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                                         ^~~~~~~
   include/linux/alloc_tag.h:255:24: note: in definition of macro 'alloc_hooks_tag'
     255 |                 _res = _do_alloc;                                       \
         |                        ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/compiler.h:208:33: note: in expansion of macro '__BUILD_BUG_ON_ZERO_MSG'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:207:35: note: in expansion of macro '__same_type'
     207 | #define __is_array(a)           (!__same_type((a), &(a)[0]))
         |                                   ^~~~~~~~~~~
   include/linux/compiler.h:208:58: note: in expansion of macro '__is_array'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                                          ^~~~~~~~~~
   include/linux/overflow.h:420:50: note: in expansion of macro '__must_be_array'
     420 |                 (count) * sizeof(*(p)->member) + __must_be_array((p)->member),  \
         |                                                  ^~~~~~~~~~~~~~~
   include/linux/overflow.h:436:32: note: in expansion of macro 'flex_array_size'
     436 |                 sizeof(*(p)) + flex_array_size(p, member, count),       \
         |                                ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
>> block/bio.c:660:41: error: 'struct bio' has no member named 'bio_vec'; did you mean 'bi_io_vec'?
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                                         ^~~~~~~
   include/linux/alloc_tag.h:255:24: note: in definition of macro 'alloc_hooks_tag'
     255 |                 _res = _do_alloc;                                       \
         |                        ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/compiler.h:208:33: note: in expansion of macro '__BUILD_BUG_ON_ZERO_MSG'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:207:35: note: in expansion of macro '__same_type'
     207 | #define __is_array(a)           (!__same_type((a), &(a)[0]))
         |                                   ^~~~~~~~~~~
   include/linux/compiler.h:208:58: note: in expansion of macro '__is_array'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                                          ^~~~~~~~~~
   include/linux/overflow.h:420:50: note: in expansion of macro '__must_be_array'
     420 |                 (count) * sizeof(*(p)->member) + __must_be_array((p)->member),  \
         |                                                  ^~~~~~~~~~~~~~~
   include/linux/overflow.h:436:32: note: in expansion of macro 'flex_array_size'
     436 |                 sizeof(*(p)) + flex_array_size(p, member, count),       \
         |                                ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
>> include/linux/compiler.h:203:82: error: expression in static assertion is not an integer
     203 | #define __BUILD_BUG_ON_ZERO_MSG(e, msg, ...) ((int)sizeof(struct {_Static_assert(!(e), msg);}))
         |                                                                                  ^
   include/linux/alloc_tag.h:255:24: note: in definition of macro 'alloc_hooks_tag'
     255 |                 _res = _do_alloc;                                       \
         |                        ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/compiler.h:208:33: note: in expansion of macro '__BUILD_BUG_ON_ZERO_MSG'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/overflow.h:420:50: note: in expansion of macro '__must_be_array'
     420 |                 (count) * sizeof(*(p)->member) + __must_be_array((p)->member),  \
         |                                                  ^~~~~~~~~~~~~~~
   include/linux/overflow.h:436:32: note: in expansion of macro 'flex_array_size'
     436 |                 sizeof(*(p)) + flex_array_size(p, member, count),       \
         |                                ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
   block/bio.c:660:41: error: 'struct bio' has no member named 'bio_vec'; did you mean 'bi_io_vec'?
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                                         ^~~~~~~
   include/linux/alloc_tag.h:255:24: note: in definition of macro 'alloc_hooks_tag'
     255 |                 _res = _do_alloc;                                       \
         |                        ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/overflow.h:436:32: note: in expansion of macro 'flex_array_size'
     436 |                 sizeof(*(p)) + flex_array_size(p, member, count),       \
         |                                ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
   block/bio.c:660:41: error: 'struct bio' has no member named 'bio_vec'; did you mean 'bi_io_vec'?
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                                         ^~~~~~~
   include/linux/alloc_tag.h:255:24: note: in definition of macro 'alloc_hooks_tag'
     255 |                 _res = _do_alloc;                                       \
         |                        ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/compiler.h:208:33: note: in expansion of macro '__BUILD_BUG_ON_ZERO_MSG'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:207:35: note: in expansion of macro '__same_type'
     207 | #define __is_array(a)           (!__same_type((a), &(a)[0]))
         |                                   ^~~~~~~~~~~
   include/linux/compiler.h:208:58: note: in expansion of macro '__is_array'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                                          ^~~~~~~~~~
   include/linux/overflow.h:421:56: note: in expansion of macro '__must_be_array'
     421 |                 size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
         |                                                        ^~~~~~~~~~~~~~~
   include/linux/overflow.h:436:32: note: in expansion of macro 'flex_array_size'
     436 |                 sizeof(*(p)) + flex_array_size(p, member, count),       \
         |                                ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                        ^~~~~~~~~~~
   block/bio.c:660:41: error: 'struct bio' has no member named 'bio_vec'; did you mean 'bi_io_vec'?
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                                         ^~~~~~~
   include/linux/alloc_tag.h:255:24: note: in definition of macro 'alloc_hooks_tag'
     255 |                 _res = _do_alloc;                                       \
         |                        ^~~~~~~~~
   include/linux/slab.h:956:49: note: in expansion of macro 'alloc_hooks'
     956 | #define kmalloc(...)                            alloc_hooks(kmalloc_noprof(__VA_ARGS__))
         |                                                 ^~~~~~~~~~~
   block/bio.c:660:16: note: in expansion of macro 'kmalloc'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
         |                ^~~~~~~
   include/linux/compiler.h:208:33: note: in expansion of macro '__BUILD_BUG_ON_ZERO_MSG'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:207:35: note: in expansion of macro '__same_type'
     207 | #define __is_array(a)           (!__same_type((a), &(a)[0]))
         |                                   ^~~~~~~~~~~
   include/linux/compiler.h:208:58: note: in expansion of macro '__is_array'
     208 | #define __must_be_array(a)      __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
         |                                                          ^~~~~~~~~~
   include/linux/overflow.h:421:56: note: in expansion of macro '__must_be_array'
     421 |                 size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
         |                                                        ^~~~~~~~~~~~~~~
   include/linux/overflow.h:436:32: note: in expansion of macro 'flex_array_size'
     436 |                 sizeof(*(p)) + flex_array_size(p, member, count),       \
         |                                ^~~~~~~~~~~~~~~
   block/bio.c:660:24: note: in expansion of macro 'struct_size'
     660 |         return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);


vim +660 block/bio.c

   637	
   638	/**
   639	 * bio_kmalloc - kmalloc a bio
   640	 * @nr_vecs:	number of bio_vecs to allocate
   641	 * @gfp_mask:   the GFP_* mask given to the slab allocator
   642	 *
   643	 * Use kmalloc to allocate a bio (including bvecs).  The bio must be initialized
   644	 * using bio_init() before use.  To free a bio returned from this function use
   645	 * kfree() after calling bio_uninit().  A bio returned from this function can
   646	 * be reused by calling bio_uninit() before calling bio_init() again.
   647	 *
   648	 * Note that unlike bio_alloc() or bio_alloc_bioset() allocations from this
   649	 * function are not backed by a mempool can fail.  Do not use this function
   650	 * for allocations in the file system I/O path.
   651	 *
   652	 * Returns: Pointer to new bio on success, NULL on failure.
   653	 */
   654	struct bio *bio_kmalloc(unsigned short nr_vecs, gfp_t gfp_mask)
   655	{
   656		struct bio *bio;
   657	
   658		if (nr_vecs > BIO_MAX_INLINE_VECS)
   659			return NULL;
 > 660		return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
   661	}
   662	EXPORT_SYMBOL(bio_kmalloc);
   663	

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