Re: [PATCH v4 3/4] xen: Mark "xen_nopvspin" parameter obsolete

[Boris Ostrovsky]

On 10/3/19 10:02 AM, Zhenzhong Duan wrote:
> Map "xen_nopvspin" to "nopvspin", fix stale description of "xen_nopvspin"
> as we use qspinlock now.
>
> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@xxxxxxxxxx>
> Cc: Jonathan Corbet <corbet@xxxxxxx>
> Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
> Cc: Juergen Gross <jgross@xxxxxxxx>
> Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Borislav Petkov <bp@xxxxxxxxx>
> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>

Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>

with a small nit

>  void __init xen_init_spinlocks(void)
>  {
> +	if (nopvspin)
> +		xen_pvspin = false;
>  
>  	/*  Don't need to use pvqspinlock code if there is only 1 vCPU. */
>  	if (num_possible_cpus() == 1)

I'd fold the change into this 'if' statement, I think it will still be
clear what the comment refers to.

-boris