[PATCH v3 06/15] powerpc/32: prepare for CONFIG_VMAP_STACK
Andrew Donnellan
ajd at linux.ibm.com
Thu Oct 17 18:36:26 AEDT 2019
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 at linux.ibm.com IBM Australia Limited
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