From patchwork Tue Nov 15 20:28:46 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 626219 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 82FC4C43217 for ; Tue, 15 Nov 2022 20:29:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232302AbiKOU35 (ORCPT ); Tue, 15 Nov 2022 15:29:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38632 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232569AbiKOU3R (ORCPT ); Tue, 15 Nov 2022 15:29:17 -0500 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 74C891659D; Tue, 15 Nov 2022 12:28:48 -0800 (PST) Message-ID: <20221115202117.438013991@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1668544127; 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=lhI4vWrTLS0UmEPOy+yLY9a4+uY4zqdwPZIU3WEgia8=; b=0L0jDWVheTH+lUpVH8Cme4AHvqhxzhwFM5thzlZjbYNCixajpNtYarLKjs5JhMfYmXdt0I Boa11in0Rf90i9OJfB1ECG5n5eslv3vZJLD97TtXc+3yK4auw1H+l4olFGw3CRtqzTWRga AE+8PxmgCmfYpQ+xCpe0K2ii+psAf3J/LbXfKnAggA+wCOQRnz/kjnmlQ5TrwyB92YnrO1 UkouQQOg9ZjS0qTBWbPDP/bvHeGril3j/gLwombTEPBzWYWRg1R/n3wHRkol9pwuWPesUO 7SO4O3jnZisJbfNS29Divd52EwkD5WH5btGRnO2574O8jPE+Z2zjzZW9bgZNwQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1668544127; 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=lhI4vWrTLS0UmEPOy+yLY9a4+uY4zqdwPZIU3WEgia8=; b=xyGRlNWi/OwMd0LPS63ukFn7w/SoiFAGTc11LkVlCjaQiuLBDCvZc0dfsQP/9bI2lq+drz qk+HLo8SCblDu7DA== 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 08/15] timers: Rename del_timer_sync() to timer_delete_sync() References: <20221115195802.415956561@linutronix.de> MIME-Version: 1.0 Date: Tue, 15 Nov 2022 21:28:46 +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) --- 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. */ @@ -1255,7 +1255,7 @@ EXPORT_SYMBOL_GPL(add_timer_on); * del_timer - Deactivate a timer. * @timer: The timer to be deactivated * - * Contrary to del_timer_sync() this function does not wait for an + * Contrary to timer_delete_sync() this function does not wait for an * eventually running timer callback on a different CPU and it neither * prevents rearming of the timer. If @timer can be rearmed concurrently * then the return value of this function is meaningless. @@ -1388,7 +1388,7 @@ 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, @@ -1410,10 +1410,10 @@ 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. * @@ -1426,7 +1426,7 @@ 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; @@ -1466,7 +1466,7 @@ 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 *), @@ -1488,8 +1488,8 @@ 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);