linux-kernel - Re: [PATCH tip/core/rcu 10/41] drivers/ipmi: Replace synchronize_sched() with synchronize

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Date:   Mon, 12 Nov 2018 10:15:41 -0600
From:   Corey Minyard <minyard@....org>
To:     paulmck@...ux.ibm.com
Cc:     linux-kernel@...r.kernel.org, mingo@...nel.org,
        jiangshanlai@...il.com, dipankar@...ibm.com,
        akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
        josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
        rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
        fweisbec@...il.com, oleg@...hat.com, joel@...lfernandes.org,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        openipmi-developer@...ts.sourceforge.net
Subject: Re: [PATCH tip/core/rcu 10/41] drivers/ipmi: Replace
 synchronize_sched() with synchronize_rcu()

On 11/12/18 10:04 AM, Paul E. McKenney wrote:
> On Mon, Nov 12, 2018 at 09:38:55AM -0600, Corey Minyard wrote:
>> On 11/11/18 1:43 PM, Paul E. McKenney wrote:
>>> Now that synchronize_rcu() waits for preempt-disable regions of code
>>> as well as RCU read-side critical sections, synchronize_sched() can be
>>> replaced by synchronize_rcu().  This commit therefore makes this change.
>> Assuming the above is true, this looks fine to me.
>>
>> Acked-by: Corey MInyard <cminyard@...sta.com>


Dang, that's

Acked-by: Corey Minyard <cminyard@...sta.com>


> Thank you!
>
>> Or I can take it in my tree, either way.
> I will carry it unless/until I send it upstream (this coming merge
> window) or I see it already upstream.
>
> So your choice.  ;-)


Ok, if you don't mind, you can carry it.

Thanks,

-corey


> 							Thanx, Paul
>
>> -corey
>>
>>
>>> Signed-off-by: Paul E. McKenney <paulmck@...ux.ibm.com>
>>> Cc: Corey Minyard <minyard@....org>
>>> Cc: Arnd Bergmann <arnd@...db.de>
>>> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
>>> Cc: <openipmi-developer@...ts.sourceforge.net>
>>> ---
>>>   drivers/char/ipmi/ipmi_si_intf.c | 2 +-
>>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
>>> index 677618e6f1f7..dc8603d34320 100644
>>> --- a/drivers/char/ipmi/ipmi_si_intf.c
>>> +++ b/drivers/char/ipmi/ipmi_si_intf.c
>>> @@ -2187,7 +2187,7 @@ static void shutdown_smi(void *send_info)
>>>   	 * handlers might have been running before we freed the
>>>   	 * interrupt.
>>>   	 */
>>> -	synchronize_sched();
>>> +	synchronize_rcu();
>>>   	/*
>>>   	 * Timeouts are stopped, now make sure the interrupts are off
>>