Re: [PATCH v6 13/20] x86/split_lock: Enable split lock detection by default

[Thomas Gleixner]

On Thu, 4 Apr 2019, Thomas Gleixner wrote:
> On Wed, 3 Apr 2019, Fenghua Yu wrote:
> > +static void init_split_lock_detect(struct cpuinfo_x86 *c)
> > +{
> > +	if (cpu_has(c, X86_FEATURE_SPLIT_LOCK_DETECT)) {
> > +		u32 l, h;
> > +
> > +		mutex_lock(&split_lock_detect_mutex);

The mutex protects what exactly in the cpu bringup code?

Thanks,

	tglx