Hi Paolo,
> -----Original Message-----
> From: Paolo Bonzini <pbonz...@redhat.com>
> Sent: Wednesday, October 16, 2019 3:25 PM
> To: Jianyong Wu (Arm Technology China) <jianyong...@arm.com>;
> net...@vger.kernel.org; yangbo...@nxp.com; john.stu...@linaro.org;
> t...@linutronix.de; sean.j.christopher...@intel.com; m...@kernel.org;
> richardcoch...@gmail.com; Mark Rutland <mark.rutl...@arm.com>;
> w...@kernel.org; Suzuki Poulose <suzuki.poul...@arm.com>
> Cc: linux-kernel@vger.kernel.org; linux-arm-ker...@lists.infradead.org;
> kvm...@lists.cs.columbia.edu; k...@vger.kernel.org; Steve Capper
> <steve.cap...@arm.com>; Kaly Xin (Arm Technology China)
> <kaly....@arm.com>; Justin He (Arm Technology China)
> <justin...@arm.com>; nd <n...@arm.com>
> Subject: Re: [PATCH v5 4/6] psci: Add hvc call service for ptp_kvm.
>
> On 15/10/19 12:48, Jianyong Wu wrote:
> > diff --git a/drivers/clocksource/arm_arch_timer.c
> > b/drivers/clocksource/arm_arch_timer.c
> > index 07e57a49d1e8..3597f1f27b10 100644
> > --- a/drivers/clocksource/arm_arch_timer.c
> > +++ b/drivers/clocksource/arm_arch_timer.c
> > @@ -1634,3 +1634,8 @@ static int __init arch_timer_acpi_init(struct
> > acpi_table_header *table) } TIMER_ACPI_DECLARE(arch_timer,
> > ACPI_SIG_GTDT, arch_timer_acpi_init); #endif
> > +
> > +bool is_arm_arch_counter(void *cs)
> > +{
> > + return (struct clocksource *)cs == &clocksource_counter; }
>
> As Thomas pointed out, any reason to have a void * here?
Need fix.
Thanks
Jianyong
>
> However, since he didn't like modifying the struct, here is an alternative
> idea:
>
> 1) add a "struct clocksource*" argument to ktime_get_snapshot
>
> 2) return -ENODEV if the argument is not NULL and is not the current
> clocksource
>
> 3) move the implementation of the hypercall to
> drivers/clocksource/arm_arch_timer.c, so that it can call
> ktime_get_snapshot(&systime_snapshot, &clocksource_counter);
>
> Paolo
