On 04/04/16 13:32, Anna-Maria Gleixner wrote:
> Xen guests do not offline/online CPUs during suspend/resume and
> therefore FROZEN notifier transitions are not required. Add this
> explanation as a comment in the code to get not confused why
> CPU_TASKS_FROZEN masked transitions are not considered.
>
> Cc: David Vrabel <david.vra...@citrix.com>
> Cc: Stefano Stabellini <stefano.stabell...@eu.citrix.com>
> Cc: xen-de...@lists.xenproject.org
> Signed-off-by: Anna-Maria Gleixner <anna-ma...@linutronix.de>
> ---
> arch/arm/xen/enlighten.c | 6 ++++++
> arch/x86/xen/enlighten.c | 7 +++++++
> drivers/xen/events/events_fifo.c | 6 ++++++
> 3 files changed, 19 insertions(+)
>
> --- a/arch/arm/xen/enlighten.c
> +++ b/arch/arm/xen/enlighten.c
> @@ -213,6 +213,12 @@ static int xen_cpu_notification(struct n
> unsigned long action,
> void *hcpu)
> {
> + /*
> + * Xen guests do not offline/online CPUs during
> + * suspend/resume, thus CPU_TASKS_FROZEN masked transitions
> + * are not considered.
> + */
This may not be true for arm guests.
David
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