Re: [PATCH 02/10] drivers/base: Use ARCH_DMA_MINALIGN instead of ARCH_KMALLOC_MINALIGN

Andy Shevchenko
2022-04-11T15:01:29Z

On Wed, Apr 6, 2022 at 2:30 PM Catalin Marinas <catalin.marinas@arm.com> wrote:
>
> ARCH_DMA_MINALIGN represents the minimum (static) alignment for safe DMA
> operations while ARCH_KMALLOC_MINALIGN is the minimum kmalloc() objects
> alignment.

...

> - * Thus we use ARCH_KMALLOC_MINALIGN here and get exactly the same
> + * Thus we use ARCH_DMA_MINALIGN here and get at least the same
> * buffer alignment as if it was allocated by plain kmalloc().

But then it becomes not true either, because the kmalloc() has other
alignment constraints.

--
With Best Regards,
Andy Shevchenko