From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753626Ab0CZXaW (ORCPT ); Fri, 26 Mar 2010 19:30:22 -0400 Received: from outbound-mail-313.bluehost.com ([67.222.54.6]:53605 "HELO outbound-mail-313.bluehost.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1753336Ab0CZXaR (ORCPT ); Fri, 26 Mar 2010 19:30:17 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=default; d=virtuousgeek.org; h=Received:From:To:Cc:Subject:Date:Message-Id:X-Mailer:In-Reply-To:References:X-Identified-User; b=m6Dg9uWOSX6R/00r1+vSuN8F3Q4Hruh/4mT5hboUy9rOM96cFW/mq2kgPKXb92R0kECv5w241IF7yvc5wvN42IFPBXiGw+mMHAclSermbpst4dW4Hgp57B66Auq5/xpT; From: Jesse Barnes To: linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org Cc: Matthew Garrett , Jesse Barnes Subject: [PATCH 1/2] timer: add on-stack deferrable timer interfaces Date: Fri, 26 Mar 2010 16:29:05 -0700 Message-Id: <1269646146-13296-2-git-send-email-jbarnes@virtuousgeek.org> X-Mailer: git-send-email 1.6.3.3 In-Reply-To: <1269646146-13296-1-git-send-email-jbarnes@virtuousgeek.org> References: <1269646146-13296-1-git-send-email-jbarnes@virtuousgeek.org> X-Identified-User: {10642:box514.bluehost.com:virtuous:virtuousgeek.org} {sentby:smtp auth 75.110.194.140 authed with jbarnes@virtuousgeek.org} Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In some cases (for instance with kernel threads) it may be desireable to use on-stack deferrable timers to get their power saving benefits. Add interfaces to support this for the IPS driver. Signed-off-by: Jesse Barnes --- include/linux/timer.h | 15 +++++++++++++++ kernel/timer.c | 13 +++++++++++++ 2 files changed, 28 insertions(+), 0 deletions(-) diff --git a/include/linux/timer.h b/include/linux/timer.h index a2d1eb6..b9bc8e1 100644 --- a/include/linux/timer.h +++ b/include/linux/timer.h @@ -94,6 +94,13 @@ void init_timer_deferrable_key(struct timer_list *timer, setup_timer_on_stack_key((timer), #timer, &__key, \ (fn), (data)); \ } while (0) +#define setup_deferrable_timer_on_stack(timer, fn, data) \ + do { \ + static struct lock_class_key __key; \ + setup_deferrable_timer_on_stack_key((timer), #timer, \ + &__key, (fn), \ + (data)); \ + } while (0) #else #define init_timer(timer)\ init_timer_key((timer), NULL, NULL) @@ -105,6 +112,8 @@ void init_timer_deferrable_key(struct timer_list *timer, setup_timer_key((timer), NULL, NULL, (fn), (data)) #define setup_timer_on_stack(timer, fn, data)\ setup_timer_on_stack_key((timer), NULL, NULL, (fn), (data)) +#define setup_deferrable_timer_on_stack(timer, fn, data)\ + setup_deferrable_timer_on_stack_key((timer), NULL, NULL, (fn), (data)) #endif #ifdef CONFIG_DEBUG_OBJECTS_TIMERS @@ -144,6 +153,12 @@ static inline void setup_timer_on_stack_key(struct timer_list *timer, init_timer_on_stack_key(timer, name, key); } +extern void setup_deferrable_timer_on_stack_key(struct timer_list *timer, + const char *name, + struct lock_class_key *key, + void (*function)(unsigned long), + unsigned long data); + /** * timer_pending - is a timer pending? * @timer: the timer in question diff --git a/kernel/timer.c b/kernel/timer.c index c61a794..a7b964a 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -557,6 +557,19 @@ static void __init_timer(struct timer_list *timer, lockdep_init_map(&timer->lockdep_map, name, key, 0); } +void setup_deferrable_timer_on_stack_key(struct timer_list *timer, + const char *name, + struct lock_class_key *key, + void (*function)(unsigned long), + unsigned long data) +{ + timer->function = function; + timer->data = data; + init_timer_on_stack_key(timer, name, key); + timer_set_deferrable(timer); +} +EXPORT_SYMBOL_GPL(setup_deferrable_timer_on_stack_key); + /** * init_timer_key - initialize a timer * @timer: the timer to be initialized -- 1.6.3.3