Re: [PATCH v3 06/15] powerpc/32: prepare for CONFIG_VMAP_STACK

[Andrew Donnellan]

On 10/9/19 7:16 pm, Christophe Leroy wrote:
> +#if defined(CONFIG_VMAP_STACK) && CONFIG_THREAD_SHIFT < PAGE_SHIFT
> +#define THREAD_SHIFT		PAGE_SHIFT
> +#else
>   #define THREAD_SHIFT		CONFIG_THREAD_SHIFT
> +#endif
>
>   #define THREAD_SIZE		(1 << THREAD_SHIFT)

Looking at 64-bit book3s: with 64K pages, this results in a THREAD_SIZE 
that's too large for immediate mode arithmetic operations, which is 
annoying. Hmm.

--
Andrew Donnellan              OzLabs, ADL Canberra
ajd@xxxxxxxxxxxxx             IBM Australia Limited