Re: [PATCH v2 2/3] nfp: flower: use vmalloc_array() to simplify code

From: kernel test robot
Date: Sat Aug 16 2025 - 01:59:58 EST

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Hi Qianfeng,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tnguy-next-queue/dev-queue]
[also build test WARNING on tnguy-net-queue/dev-queue net-next/main net/main linus/master v6.17-rc1 next-20250815]
[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/Qianfeng-Rong/eth-intel-use-vmalloc_array-to-simplify-code/20250814-183400
base: https://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue.git dev-queue
patch link: https://lore.kernel.org/r/20250814102100.151942-3-rongqianfeng%40vivo.com
patch subject: [PATCH v2 2/3] nfp: flower: use vmalloc_array() to simplify code
config: s390-allyesconfig (https://download.01.org/0day-ci/archive/20250816/202508161307.IWBBnNXY-lkp@xxxxxxxxx/config)
compiler: s390-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250816/202508161307.IWBBnNXY-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/202508161307.IWBBnNXY-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

In file included from include/linux/vmalloc.h:5,
from drivers/net/ethernet/netronome/nfp/flower/metadata.c:8:
drivers/net/ethernet/netronome/nfp/flower/metadata.c: In function 'nfp_flower_metadata_init':
>> include/linux/stddef.h:24:42: warning: 'vmalloc_array_noprof' sizes specified with 'sizeof' in the earlier argument and not in the later argument [-Wcalloc-transposed-args]
24 | #define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER))
| ^
include/linux/alloc_tag.h:239:16: note: in definition of macro 'alloc_hooks_tag'
239 | typeof(_do_alloc) _res; \
| ^~~~~~~~~
include/linux/vmalloc.h:192:33: note: in expansion of macro 'alloc_hooks'
192 | #define vmalloc_array(...) alloc_hooks(vmalloc_array_noprof(__VA_ARGS__))
| ^~~~~~~~~~~
drivers/net/ethernet/netronome/nfp/flower/metadata.c:567:17: note: in expansion of macro 'vmalloc_array'
567 | vmalloc_array(NFP_FL_STATS_ELEM_RS,
| ^~~~~~~~~~~~~
drivers/net/ethernet/netronome/nfp/flower/main.h:29:41: note: in expansion of macro 'sizeof_field'
29 | #define NFP_FL_STATS_ELEM_RS sizeof_field(struct nfp_fl_stats_id, \
| ^~~~~~~~~~~~
drivers/net/ethernet/netronome/nfp/flower/metadata.c:567:31: note: in expansion of macro 'NFP_FL_STATS_ELEM_RS'
567 | vmalloc_array(NFP_FL_STATS_ELEM_RS,
| ^~~~~~~~~~~~~~~~~~~~
include/linux/stddef.h:24:42: note: earlier argument should specify number of elements, later size of each element
24 | #define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER))
| ^
include/linux/alloc_tag.h:239:16: note: in definition of macro 'alloc_hooks_tag'
239 | typeof(_do_alloc) _res; \
| ^~~~~~~~~
include/linux/vmalloc.h:192:33: note: in expansion of macro 'alloc_hooks'
192 | #define vmalloc_array(...) alloc_hooks(vmalloc_array_noprof(__VA_ARGS__))
| ^~~~~~~~~~~
drivers/net/ethernet/netronome/nfp/flower/metadata.c:567:17: note: in expansion of macro 'vmalloc_array'
567 | vmalloc_array(NFP_FL_STATS_ELEM_RS,
| ^~~~~~~~~~~~~
drivers/net/ethernet/netronome/nfp/flower/main.h:29:41: note: in expansion of macro 'sizeof_field'
29 | #define NFP_FL_STATS_ELEM_RS sizeof_field(struct nfp_fl_stats_id, \
| ^~~~~~~~~~~~
drivers/net/ethernet/netronome/nfp/flower/metadata.c:567:31: note: in expansion of macro 'NFP_FL_STATS_ELEM_RS'
567 | vmalloc_array(NFP_FL_STATS_ELEM_RS,
| ^~~~~~~~~~~~~~~~~~~~
>> include/linux/stddef.h:24:42: warning: 'vmalloc_array_noprof' sizes specified with 'sizeof' in the earlier argument and not in the later argument [-Wcalloc-transposed-args]
24 | #define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER))
| ^
include/linux/alloc_tag.h:243:24: note: in definition of macro 'alloc_hooks_tag'
243 | _res = _do_alloc; \
| ^~~~~~~~~
include/linux/vmalloc.h:192:33: note: in expansion of macro 'alloc_hooks'
192 | #define vmalloc_array(...) alloc_hooks(vmalloc_array_noprof(__VA_ARGS__))
| ^~~~~~~~~~~
drivers/net/ethernet/netronome/nfp/flower/metadata.c:567:17: note: in expansion of macro 'vmalloc_array'
567 | vmalloc_array(NFP_FL_STATS_ELEM_RS,
| ^~~~~~~~~~~~~
drivers/net/ethernet/netronome/nfp/flower/main.h:29:41: note: in expansion of macro 'sizeof_field'
29 | #define NFP_FL_STATS_ELEM_RS sizeof_field(struct nfp_fl_stats_id, \
| ^~~~~~~~~~~~
drivers/net/ethernet/netronome/nfp/flower/metadata.c:567:31: note: in expansion of macro 'NFP_FL_STATS_ELEM_RS'
567 | vmalloc_array(NFP_FL_STATS_ELEM_RS,
| ^~~~~~~~~~~~~~~~~~~~
include/linux/stddef.h:24:42: note: earlier argument should specify number of elements, later size of each element
24 | #define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER))
| ^
include/linux/alloc_tag.h:243:24: note: in definition of macro 'alloc_hooks_tag'
243 | _res = _do_alloc; \
| ^~~~~~~~~
include/linux/vmalloc.h:192:33: note: in expansion of macro 'alloc_hooks'
192 | #define vmalloc_array(...) alloc_hooks(vmalloc_array_noprof(__VA_ARGS__))
| ^~~~~~~~~~~
drivers/net/ethernet/netronome/nfp/flower/metadata.c:567:17: note: in expansion of macro 'vmalloc_array'
567 | vmalloc_array(NFP_FL_STATS_ELEM_RS,
| ^~~~~~~~~~~~~
drivers/net/ethernet/netronome/nfp/flower/main.h:29:41: note: in expansion of macro 'sizeof_field'
29 | #define NFP_FL_STATS_ELEM_RS sizeof_field(struct nfp_fl_stats_id, \
| ^~~~~~~~~~~~
drivers/net/ethernet/netronome/nfp/flower/metadata.c:567:31: note: in expansion of macro 'NFP_FL_STATS_ELEM_RS'
567 | vmalloc_array(NFP_FL_STATS_ELEM_RS,
| ^~~~~~~~~~~~~~~~~~~~
>> include/linux/stddef.h:24:42: warning: 'vmalloc_array_noprof' sizes specified with 'sizeof' in the earlier argument and not in the later argument [-Wcalloc-transposed-args]
24 | #define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER))
| ^
include/linux/alloc_tag.h:246:24: note: in definition of macro 'alloc_hooks_tag'
246 | _res = _do_alloc; \
| ^~~~~~~~~
include/linux/vmalloc.h:192:33: note: in expansion of macro 'alloc_hooks'
192 | #define vmalloc_array(...) alloc_hooks(vmalloc_array_noprof(__VA_ARGS__))
| ^~~~~~~~~~~
drivers/net/ethernet/netronome/nfp/flower/metadata.c:567:17: note: in expansion of macro 'vmalloc_array'
567 | vmalloc_array(NFP_FL_STATS_ELEM_RS,
| ^~~~~~~~~~~~~
drivers/net/ethernet/netronome/nfp/flower/main.h:29:41: note: in expansion of macro 'sizeof_field'
29 | #define NFP_FL_STATS_ELEM_RS sizeof_field(struct nfp_fl_stats_id, \
| ^~~~~~~~~~~~
drivers/net/ethernet/netronome/nfp/flower/metadata.c:567:31: note: in expansion of macro 'NFP_FL_STATS_ELEM_RS'
567 | vmalloc_array(NFP_FL_STATS_ELEM_RS,
| ^~~~~~~~~~~~~~~~~~~~
include/linux/stddef.h:24:42: note: earlier argument should specify number of elements, later size of each element
24 | #define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER))
| ^
include/linux/alloc_tag.h:246:24: note: in definition of macro 'alloc_hooks_tag'
246 | _res = _do_alloc; \
| ^~~~~~~~~
include/linux/vmalloc.h:192:33: note: in expansion of macro 'alloc_hooks'
192 | #define vmalloc_array(...) alloc_hooks(vmalloc_array_noprof(__VA_ARGS__))
| ^~~~~~~~~~~
drivers/net/ethernet/netronome/nfp/flower/metadata.c:567:17: note: in expansion of macro 'vmalloc_array'
567 | vmalloc_array(NFP_FL_STATS_ELEM_RS,
| ^~~~~~~~~~~~~
drivers/net/ethernet/netronome/nfp/flower/main.h:29:41: note: in expansion of macro 'sizeof_field'
29 | #define NFP_FL_STATS_ELEM_RS sizeof_field(struct nfp_fl_stats_id, \
| ^~~~~~~~~~~~
drivers/net/ethernet/netronome/nfp/flower/metadata.c:567:31: note: in expansion of macro 'NFP_FL_STATS_ELEM_RS'
567 | vmalloc_array(NFP_FL_STATS_ELEM_RS,
| ^~~~~~~~~~~~~~~~~~~~

vim +24 include/linux/stddef.h

3876488444e712 Denys Vlasenko 2015-03-09 17
4229a470175be1 Kees Cook 2018-01-10 18 /**
e7f18c22e6bea2 Kees Cook 2021-08-19 19 * sizeof_field() - Report the size of a struct field in bytes
4229a470175be1 Kees Cook 2018-01-10 20 *
4229a470175be1 Kees Cook 2018-01-10 21 * @TYPE: The structure containing the field of interest
4229a470175be1 Kees Cook 2018-01-10 22 * @MEMBER: The field to return the size of
4229a470175be1 Kees Cook 2018-01-10 23 */
4229a470175be1 Kees Cook 2018-01-10 @24 #define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER))
4229a470175be1 Kees Cook 2018-01-10 25

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