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

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Message-ID: <16c19493-44b0-18e3-d3cb-4d6c2f9f9f53@acm.org>
Date:   Mon, 12 Nov 2018 09:38:55 -0600
From:   Corey Minyard <minyard@....org>
To:     "Paul E. McKenney" <paulmck@...ux.ibm.com>,
        linux-kernel@...r.kernel.org
Cc:     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 11/11/18 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>

Or I can take it in my tree, either way.

-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