Re: [PATCH 4/4] x86/cpu: Use SERIALIZE in sync_core() when available

[Ricardo Neri]

On Mon, Jul 27, 2020 at 10:20:03AM +0200, peterz@xxxxxxxxxxxxx wrote:
> On Sun, Jul 26, 2020 at 09:31:32PM -0700, Ricardo Neri wrote:
> > +static inline void serialize(void)
> > +{
> > +	asm volatile(".byte 0xf, 0x1, 0xe8");
> > +}
> 
> Can we pretty please have a comment with the binutils version that has
> the mnomic? Such that when we increase the required binutils version we
> can grep for this.

This is supported since binutils 2.35[1]. I'll add a comment with the
clarification.

Thanks and BR,
Ricardo

[1]. https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob_plain;f=gas/NEWS;;hb=refs/tags/binutils-2_35