Re: [Intel-gfx] [PATCH] drm/i915/mtl: avoid stringop-overflow warning

[Arnd Bergmann]

On Tue, Oct 17, 2023, at 00:10, Andi Shyti wrote:
> Hi Arnd,
>
>>  static void rc6_res_reg_init(struct intel_rc6 *rc6)
>>  {
>> -	memset(rc6->res_reg, INVALID_MMIO_REG.reg, sizeof(rc6->res_reg));
>
> This is a complex initialization, indeed... how about just
>
>    memset(rc6->res_reg, 0, sizeof(rc6->res_reg));
>
>> +	i915_reg_t res_reg[INTEL_RC6_RES_MAX] = {
>> +		[0 ... INTEL_RC6_RES_MAX - 1] = INVALID_MMIO_REG,
>> +	};
>
> This is basically a
>
>    i915_reg_t res_reg[INTEL_RC6_RES_MAX] = { };
>
> Don't know which one is clearer.

Right, the original code went out of its way to use INVALID_MMIO_REG
instead of assuming it is zero, so I tried to preserve that for
consistency.

    Arnd