Re: [PATCH v2] regulator: s2mps11: Simplify expression used in BUILD_BUG_ON

[Andi Shyti <andi.shyti@samsung.com>]

Hi Krzysztof,

> Following BUILD_BUG_ON using a variable fails for some of the compilers
> and optimization levels (reported for gcc 4.9):
> 	var = ARRAY_SIZE(s2mps15_regulators);
> 	BUILD_BUG_ON(S2MPS_REGULATOR_MAX < var);
> Fix this by using ARRAY_SIZE directly.
> 
> Additionally add missing BUILD_BUG_ON check for S2MPS15 device (the
> check ensures that internal arrays are big enough to hold data for all
> of regulators on all devices).
> 
> Reported-by: Arnd Bergmann <arnd@arndb.de>
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> 

[...]

>  	case S2MPS11X:
>  		s2mps11->rdev_num = ARRAY_SIZE(s2mps11_regulators);

Why don't we remove rdev_num at all? It's not used that much
other than in the probe function.

>  		regulators = s2mps11_regulators;
> -		BUILD_BUG_ON(S2MPS_REGULATOR_MAX < s2mps11->rdev_num);
> +		BUILD_BUG_ON(S2MPS_REGULATOR_MAX < ARRAY_SIZE(s2mps11_regulators));
>  		break;

Andi