Re: [PATCH v2 10/10] x86, asm: Use CC_SET()/CC_OUT() and static_cpu_has() in archrandom.h

[Borislav Petkov]

On Wed, Jun 08, 2016 at 12:38:46PM -0700, H. Peter Anvin wrote:
> Use CC_SET()/CC_OUT() and static_cpu_has().  This produces code good
> enough to eliminate ad hoc use of alternatives in <asm/archrandom.h>,
> greatly simplifying the code.
> 
> While we are at it, make x86_init_rdrand() compile out completely if
> we don't need it.
> 
> Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
> 
> v2: fix a conflict between <linux/random.h> and <asm/archrandom.h>
>     discovered by Ingo Molnar.  There are a few places in x86-specific
>     code where we need all of <arch/archrandom.h> even when
>     CONFIG_ARCH_RANDOM is disabled, so <linux/random.h> does not
>     suffice.
> ---
>  arch/x86/include/asm/archrandom.h | 128 ++++++++++++++++++--------------------
>  arch/x86/kernel/cpu/rdrand.c      |   4 +-
>  2 files changed, 62 insertions(+), 70 deletions(-)

Reviewed-by: Borislav Petkov <bp@xxxxxxx>

-- 
Regards/Gruss,
    Boris.

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