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

From: Zhenzhong Duan
Date: Sun Oct 06 2019 - 03:54:32 EST



On 2019/10/4 22:57, Boris Ostrovsky wrote:
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.

Good suggestion, will do that. Thanks

Zhenzhong