Re: [PATCH] KVM: s390: use ARRAY_SIZE instead of division operation

Heiko Carstens
2021-02-21T19:08:02Z

On Sat, Feb 20, 2021 at 04:22:37PM +0800, Yang Li wrote:
> This eliminates the following coccicheck warning:
> ./arch/s390/tools/gen_facilities.c:154:37-38: WARNING: Use ARRAY_SIZE
> ./arch/s390/tools/gen_opcode_table.c:141:39-40: WARNING: Use ARRAY_SIZE
>
> Reported-by: Abaci Robot <abaci@linux.alibaba.com>
> Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
> ---
> arch/s390/tools/gen_facilities.c | 2 +-
> arch/s390/tools/gen_opcode_table.c | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/s390/tools/gen_facilities.c b/arch/s390/tools/gen_facilities.c
> index 61ce5b5..5366817 100644
> --- a/arch/s390/tools/gen_facilities.c
> +++ b/arch/s390/tools/gen_facilities.c
> @@ -151,7 +151,7 @@ static void print_facility_lists(void)
> {
> unsigned int i;
>
> - for (i = 0; i < sizeof(facility_defs) / sizeof(facility_defs[0]); i++)
> + for (i = 0; i < ARRAY_SIZE(facility_defs); i++)
> print_facility_list(&facility_defs[i]);
> }
>
> diff --git a/arch/s390/tools/gen_opcode_table.c b/arch/s390/tools/gen_opcode_table.c
> index a1bc02b..468b70c 100644
> --- a/arch/s390/tools/gen_opcode_table.c
> +++ b/arch/s390/tools/gen_opcode_table.c
> @@ -138,7 +138,7 @@ static struct insn_type *insn_format_to_type(char *format)
> strcpy(tmp, format);
> base_format = tmp;
> base_format = strsep(&base_format, "_");
> - for (i = 0; i < sizeof(insn_type_table) / sizeof(insn_type_table[0]); i++) {
> + for (i = 0; i < ARRAY_SIZE(insn_type_table); i++) {

There is a reason why this doesn't use ARRAY_SIZE()...
Please stop sending trivial patches without even looking at the code.