Re: [PATCH v4 01/17] x86/common: Align cpu_caps_cleared and cpu_caps_set to unsigned long

Peter Zijlstra
2019-03-04T12:44:33Z

On Mon, Mar 04, 2019 at 11:48:18AM +0100, Paolo Bonzini wrote:
> True that. On the other hand btsl/btrl is also one byte smaller if no
> operand is %r8-%r15.

Because then we loose the REX prefix, right. Now _that_ might actually
be a reason to do that :-)

> In any case, /me wonders if we should have a macro like
>
> #define DECLARE_LE_BITMAP(name,bits) \
> u32 name[DIV_ROUND_UP(bits, 32)] __aligned(sizeof(unsigned long))

s/u32/__le32/

To go in bitops/le.h, sure, if there's enough users.