linux-kernel - Re: [PATCH rcu v2 15/20] kernel/notifier: Remove CONFIG

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Message-ID: <608756bb-3012-e02c-5b16-04314cdc9889@intel.com>
Date:   Fri, 13 Jan 2023 12:25:48 +0100
From:   "Wysocki, Rafael J" <rafael.j.wysocki@...el.com>
To:     "Paul E. McKenney" <paulmck@...nel.org>, <rcu@...r.kernel.org>
CC:     <linux-kernel@...r.kernel.org>, <kernel-team@...a.com>,
        <rostedt@...dmis.org>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        Borislav Petkov <bp@...e.de>,
        Alan Stern <stern@...land.harvard.edu>,
        John Ogness <john.ogness@...utronix.de>
Subject: Re: [PATCH rcu v2 15/20] kernel/notifier: Remove CONFIG_SRCU


On 1/13/2023 1:11 AM, Paul E. McKenney wrote:
> Now that the SRCU Kconfig option is unconditionally selected, there is
> no longer any point in conditional compilation based on CONFIG_SRCU.
> Therefore, remove the #ifdef.
>
> Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
> Cc: "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
> Cc: "Michał Mirosław" <mirq-linux@...e.qmqm.pl>
> Cc: Borislav Petkov <bp@...e.de>
> Cc: Alan Stern <stern@...land.harvard.edu>
> Reviewed-by: John Ogness <john.ogness@...utronix.de>

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>


> ---
>   kernel/notifier.c | 3 ---
>   1 file changed, 3 deletions(-)
>
> diff --git a/kernel/notifier.c b/kernel/notifier.c
> index ab75637fd904f..d353e4b5402d7 100644
> --- a/kernel/notifier.c
> +++ b/kernel/notifier.c
> @@ -456,7 +456,6 @@ int raw_notifier_call_chain(struct raw_notifier_head *nh,
>   }
>   EXPORT_SYMBOL_GPL(raw_notifier_call_chain);
>   
> -#ifdef CONFIG_SRCU
>   /*
>    *	SRCU notifier chain routines.    Registration and unregistration
>    *	use a mutex, and call_chain is synchronized by SRCU (no locks).
> @@ -573,8 +572,6 @@ void srcu_init_notifier_head(struct srcu_notifier_head *nh)
>   }
>   EXPORT_SYMBOL_GPL(srcu_init_notifier_head);
>   
> -#endif /* CONFIG_SRCU */
> -
>   static ATOMIC_NOTIFIER_HEAD(die_chain);
>   
>   int notrace notify_die(enum die_val val, const char *str,