From patchwork Tue Nov 22 17:44:58 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 628056 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0AC3BC433FE for ; Tue, 22 Nov 2022 17:45:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234540AbiKVRps (ORCPT ); Tue, 22 Nov 2022 12:45:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59626 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234425AbiKVRp3 (ORCPT ); Tue, 22 Nov 2022 12:45:29 -0500 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A90347AF7A; Tue, 22 Nov 2022 09:45:00 -0800 (PST) Message-ID: <20221122173648.619071341@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1669139099; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=loWOeteSDfXqDwCwhR8PkMj0fJ4Wcn9TP/qRmPXVBa4=; b=0hGO5Wk0pIFm1S0qXeQ7PdXOz5PGq9RcqJf+EmVCFF9bex2AVxb7gkfQnxHICeUi7/Ofuh 48V9LXYVsWvLvrvtLAc0iwSq/iSlDCxv91iy9EKhkMlJsVs5rEkw8/mNfElda3OynSfpol LI8lc6naiyJ1JLUj0ip9QTVlns8m+Ac4IZW7XvnECZ6oE45BuisMRZyJRaEwaMadBWEPDc 2lgqKklCAGeS+HNbHTasKvZQ7hypSXUsAmYEOPBviKCesT1hq21R5jefyA8lK78lPHXWaV 8VS1tyDeFLdoLFs3Rj3jvJ3ij/YuZ3PJ3ksst1VziEqbsO9wSs1odqw2PynWjw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1669139099; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=loWOeteSDfXqDwCwhR8PkMj0fJ4Wcn9TP/qRmPXVBa4=; b=kzKXKPXw/BGYqj/wvLmudmM7Vc295HgkEEBR1suH31GOdddL+BaN6HBZIeYF6GHCSfOgG7 6M9XpNmCuBPLjoAQ== From: Thomas Gleixner To: LKML Cc: Linus Torvalds , Steven Rostedt , Anna-Maria Behnsen , Peter Zijlstra , Stephen Boyd , Guenter Roeck , Andrew Morton , Julia Lawall , Arnd Bergmann , Viresh Kumar , Marc Zyngier , Marcel Holtmann , Johan Hedberg , Luiz Augusto von Dentz , linux-bluetooth@vger.kernel.org, "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , netdev@vger.kernel.org Subject: [patch V2 09/17] timers: Rename del_timer_sync() to timer_delete_sync() References: <20221122171312.191765396@linutronix.de> MIME-Version: 1.0 Date: Tue, 22 Nov 2022 18:44:58 +0100 (CET) Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org The timer related functions do not have a strict timer_ prefixed namespace which is really annoying. Rename del_timer_sync() to timer_delete_sync() and provide del_timer_sync() as a wrapper. Document that del_timer_sync() is not for new code. Signed-off-by: Thomas Gleixner Reviewed-by: Steven Rostedt (Google) Tested-by: Guenter Roeck --- include/linux/timer.h | 15 ++++++++++++++- kernel/time/timer.c | 18 +++++++++--------- 2 files changed, 23 insertions(+), 10 deletions(-) --- a/include/linux/timer.h +++ b/include/linux/timer.h @@ -183,7 +183,20 @@ extern int timer_reduce(struct timer_lis extern void add_timer(struct timer_list *timer); extern int try_to_del_timer_sync(struct timer_list *timer); -extern int del_timer_sync(struct timer_list *timer); +extern int timer_delete_sync(struct timer_list *timer); + +/** + * del_timer_sync - Delete a pending timer and wait for a running callback + * @timer: The timer to be deleted + * + * See timer_delete_sync() for detailed explanation. + * + * Do not use in new code. Use timer_delete_sync() instead. + */ +static inline int del_timer_sync(struct timer_list *timer) +{ + return timer_delete_sync(timer); +} extern void init_timers(void); struct hrtimer; --- a/kernel/time/timer.c +++ b/kernel/time/timer.c @@ -1083,7 +1083,7 @@ static inline int /* * We are trying to schedule the timer on the new base. * However we can't change timer's base while it is running, - * otherwise del_timer_sync() can't detect that the timer's + * otherwise timer_delete_sync() can't detect that the timer's * handler yet has not finished. This also guarantees that the * timer is serialized wrt itself. */ @@ -1257,7 +1257,7 @@ EXPORT_SYMBOL_GPL(add_timer_on); * @timer: The timer to be deactivated * * The function only deactivates a pending timer, but contrary to - * del_timer_sync() it does not take into account whether the timers + * timer_delete_sync() it does not take into account whether the timers * callback function is concurrently executed on a different CPU or not. * It neither prevents rearming of the timer. If @timer can be rearmed * concurrently then the return value of this function is meaningless. @@ -1393,7 +1393,7 @@ static inline void del_timer_wait_runnin #endif /** - * del_timer_sync - Deactivate a timer and wait for the handler to finish. + * timer_delete_sync - Deactivate a timer and wait for the handler to finish. * @timer: The timer to be deactivated * * Synchronization rules: Callers must prevent restarting of the timer, @@ -1415,10 +1415,10 @@ static inline void del_timer_wait_runnin * spin_lock_irq(somelock); * * spin_lock(somelock); - * del_timer_sync(mytimer); + * timer_delete_sync(mytimer); * while (base->running_timer == mytimer); * - * Now del_timer_sync() will never return and never release somelock. + * Now timer_delete_sync() will never return and never release somelock. * The interrupt on the other CPU is waiting to grab somelock but it has * interrupted the softirq that CPU0 is waiting to finish. * @@ -1431,7 +1431,7 @@ static inline void del_timer_wait_runnin * * %0 - The timer was not pending * * %1 - The timer was pending and deactivated */ -int del_timer_sync(struct timer_list *timer) +int timer_delete_sync(struct timer_list *timer) { int ret; @@ -1471,7 +1471,7 @@ int del_timer_sync(struct timer_list *ti return ret; } -EXPORT_SYMBOL(del_timer_sync); +EXPORT_SYMBOL(timer_delete_sync); static void call_timer_fn(struct timer_list *timer, void (*fn)(struct timer_list *), @@ -1493,8 +1493,8 @@ static void call_timer_fn(struct timer_l #endif /* * Couple the lock chain with the lock chain at - * del_timer_sync() by acquiring the lock_map around the fn() - * call here and in del_timer_sync(). + * timer_delete_sync() by acquiring the lock_map around the fn() + * call here and in timer_delete_sync(). */ lock_map_acquire(&lockdep_map);