Return-path: Received: from mail-pf0-f177.google.com ([209.85.192.177]:51086 "EHLO mail-pf0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751618AbdJDX2I (ORCPT ); Wed, 4 Oct 2017 19:28:08 -0400 Received: by mail-pf0-f177.google.com with SMTP id m63so7039255pfk.7 for ; Wed, 04 Oct 2017 16:28:08 -0700 (PDT) From: Kees Cook To: Thomas Gleixner Cc: Kees Cook , Andrew Morton , Petr Mladek , Tejun Heo , Oleg Nesterov , Arnd Bergmann , Benjamin Herrenschmidt , Chris Metcalf , Geert Uytterhoeven , Greg Kroah-Hartman , Guenter Roeck , Harish Patil , Heiko Carstens , "James E.J. Bottomley" , John Stultz , Julian Wiedmann , Kalle Valo , Lai Jiangshan , Len Brown , Manish Chopra , Mark Gross , "Martin K. Petersen" , Martin Schwidefsky , Michael Ellerman , Michael Reed , netdev@vger.kernel.org, Paul Mackerras , Pavel Machek , "Rafael J. Wysocki" , Ralf Baechle , Sebastian Reichel , Stefan Richter , Stephen Boyd , Sudip Mukherjee , Ursula Braun , Viresh Kumar , Wim Van Sebroeck , linux1394-devel@lists.sourceforge.net, linux-mips@linux-mips.org, linux-pm@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 12/13] kthread: Convert callback to use from_timer() Date: Wed, 4 Oct 2017 16:27:06 -0700 Message-Id: <1507159627-127660-13-git-send-email-keescook@chromium.org> (sfid-20171005_012922_527853_D47A319C) In-Reply-To: <1507159627-127660-1-git-send-email-keescook@chromium.org> References: <1507159627-127660-1-git-send-email-keescook@chromium.org> Sender: linux-wireless-owner@vger.kernel.org List-ID: In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch kthread to use from_timer() and pass the timer pointer explicitly. Cc: Andrew Morton Cc: Petr Mladek Cc: Tejun Heo Cc: Thomas Gleixner Cc: Oleg Nesterov Signed-off-by: Kees Cook --- include/linux/kthread.h | 10 +++++----- kernel/kthread.c | 10 ++++------ 2 files changed, 9 insertions(+), 11 deletions(-) diff --git a/include/linux/kthread.h b/include/linux/kthread.h index 0d622b350d3f..35cbe3b0ce5b 100644 --- a/include/linux/kthread.h +++ b/include/linux/kthread.h @@ -75,7 +75,7 @@ extern int tsk_fork_get_node(struct task_struct *tsk); */ struct kthread_work; typedef void (*kthread_work_func_t)(struct kthread_work *work); -void kthread_delayed_work_timer_fn(unsigned long __data); +void kthread_delayed_work_timer_fn(struct timer_list *t); enum { KTW_FREEZABLE = 1 << 0, /* freeze during suspend */ @@ -116,8 +116,8 @@ struct kthread_delayed_work { #define KTHREAD_DELAYED_WORK_INIT(dwork, fn) { \ .work = KTHREAD_WORK_INIT((dwork).work, (fn)), \ - .timer = __TIMER_INITIALIZER(kthread_delayed_work_timer_fn, \ - (unsigned long)&(dwork), \ + .timer = __TIMER_INITIALIZER((TIMER_FUNC_TYPE)kthread_delayed_work_timer_fn,\ + (TIMER_DATA_TYPE)&(dwork.timer), \ TIMER_IRQSAFE), \ } @@ -164,8 +164,8 @@ extern void __kthread_init_worker(struct kthread_worker *worker, do { \ kthread_init_work(&(dwork)->work, (fn)); \ __setup_timer(&(dwork)->timer, \ - kthread_delayed_work_timer_fn, \ - (unsigned long)(dwork), \ + (TIMER_FUNC_TYPE)kthread_delayed_work_timer_fn,\ + (TIMER_DATA_TYPE)&(dwork)->timer, \ TIMER_IRQSAFE); \ } while (0) diff --git a/kernel/kthread.c b/kernel/kthread.c index 1c19edf82427..ba3992c8c375 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -798,15 +798,14 @@ EXPORT_SYMBOL_GPL(kthread_queue_work); /** * kthread_delayed_work_timer_fn - callback that queues the associated kthread * delayed work when the timer expires. - * @__data: pointer to the data associated with the timer + * @t: pointer to the expired timer * * The format of the function is defined by struct timer_list. * It should have been called from irqsafe timer with irq already off. */ -void kthread_delayed_work_timer_fn(unsigned long __data) +void kthread_delayed_work_timer_fn(struct timer_list *t) { - struct kthread_delayed_work *dwork = - (struct kthread_delayed_work *)__data; + struct kthread_delayed_work *dwork = from_timer(dwork, t, timer); struct kthread_work *work = &dwork->work; struct kthread_worker *worker = work->worker; @@ -837,8 +836,7 @@ void __kthread_queue_delayed_work(struct kthread_worker *worker, struct timer_list *timer = &dwork->timer; struct kthread_work *work = &dwork->work; - WARN_ON_ONCE(timer->function != kthread_delayed_work_timer_fn || - timer->data != (unsigned long)dwork); + WARN_ON_ONCE(timer->function != (TIMER_FUNC_TYPE)kthread_delayed_work_timer_fn); /* * If @delay is 0, queue @dwork->work immediately. This is for -- 2.7.4