Re: [PATCH] kthread: Mark timer used by delayed kthread works as IRQ safe

From: Grygorii Strashko
Date: Mon Mar 16 2020 - 08:23:53 EST


Hi Petr,

On 19/02/2020 17:22, Tejun Heo wrote:
On Mon, Feb 17, 2020 at 01:07:09PM +0100, Petr Mladek wrote:
The timer used by delayed kthread works are IRQ safe because the used
kthread_delayed_work_timer_fn() is IRQ safe.

It is properly marked when initialized by KTHREAD_DELAYED_WORK_INIT().
But TIMER_IRQSAFE flag is missing when initialized by
kthread_init_delayed_work().

The missing flag might trigger invalid warning from del_timer_sync()
when kthread_mod_delayed_work() is called with interrupts disabled.

Reported-by: Grygorii Strashko <grygorii.strashko@xxxxxx>
Signed-off-by: Petr Mladek <pmladek@xxxxxxxx>
Tested-by: Grygorii Strashko <grygorii.strashko@xxxxxx>

Acked-by: Tejun Heo <tj@xxxxxxxxxx>

I'm worry shouldn't this patch have "fixes" tag?

--
Best regards,
grygorii