Re: [PATCH v3 2/4] iio: core: Add opaque_struct_size() helper and use it

[Andy Shevchenko]

On Mon, Jul 24, 2023 at 02:02:02PM +0300, Andy Shevchenko wrote:
> Introduce opaque_struct_size() helper, which may be moved
> to overflow.h in the future, and use it in the IIO core.
> 
> Potential users could be (among possible others):
> 
> 	__spi_alloc_controller() in drivers/spi/spi.c
> 	alloc_netdev_mqs in net/core/dev.c

...

> +#define opaque_struct_size(p, a, s)	size_add(ALIGN(sizeof(*(p)), (a)), (s))

This actually might need something like __safe_aling() which takes care about
possible overflow.

Whatever, I want to hear Kees on this.

-- 
With Best Regards,
Andy Shevchenko