Re: [PATCH 1/6] mm: add kmalloc_array_node and kcalloc_node

[Christopher Lameter]

On Wed, 27 Sep 2017, Johannes Thumshirn wrote:

> +static inline void *kmalloc_array_node(size_t n, size_t size, gfp_t flags,
> +				       int node)
> +{
> +	if (size != 0 && n > SIZE_MAX / size)
> +		return NULL;
> +	if (__builtin_constant_p(n) && __builtin_constant_p(size))
> +		return kmalloc_node(n * size, flags, node);

Isnt the same check done by kmalloc_node already? The result of
multiplying two constants is a constant after all.