On Tue, Jan 16, 2018 at 03:28:30PM +0100, Peter Zijlstra wrote:
> In order to recognise static_cpu_has() alternatives from any other
> alternative without dodgy heuristics, we need to explicitly mark them.
> Use the new type field for this.
>
> Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org>
> ---
> arch/x86/include/asm/alternative.h | 1 +
> arch/x86/include/asm/cpufeature.h | 5 +++--
> 2 files changed, 4 insertions(+), 2 deletions(-)
>
> --- a/arch/x86/include/asm/alternative.h
> +++ b/arch/x86/include/asm/alternative.h
> @@ -46,6 +46,7 @@
> #endif
>
> #define ALT_TYPE_DEFAULT 0
> +#define ALT_TYPE_STATIC_CPU_HAS 1 /* objtool, static_cpu_has */
Just a nitpick: let's be more verbose in that comment:
/*
* This alt_instr descriptor is part of a static_cpu_has() construct. Use it to
* detect its type when processing with other tools, like objtool, for example.
*/
#define ALT_TYPE_STATIC_CPU_HAS 1
With that:
Reviewed-by: Borislav Petkov <b...@suse.de>
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
