From patchwork Mon Jan 27 06:08:19 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Pitre X-Patchwork-Id: 314314 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from ozlabs.org (localhost [IPv6:::1]) by ozlabs.org (Postfix) with ESMTP id 07ACE2C07FD for ; Mon, 27 Jan 2014 17:27:25 +1100 (EST) Received: from relais.videotron.ca (relais.videotron.ca [24.201.245.36]) by ozlabs.org (Postfix) with ESMTP id 60CD02C00C4 for ; Mon, 27 Jan 2014 17:24:19 +1100 (EST) Received: from yoda.home ([66.130.143.177]) by VL-VM-MR006.ip.videotron.ca (Oracle Communications Messaging Exchange Server 7u4-22.01 64bit (built Apr 21 2011)) with ESMTP id <0N0100CK1QFBKVJ0@VL-VM-MR006.ip.videotron.ca> for linuxppc-dev@lists.ozlabs.org; Mon, 27 Jan 2014 01:09:11 -0500 (EST) Received: from xanadu.home (xanadu.home [192.168.2.2]) by yoda.home (Postfix) with ESMTP id 511C12DA06A5; Mon, 27 Jan 2014 01:09:11 -0500 (EST) From: Nicolas Pitre To: Russell King , Catalin Marinas , Benjamin Herrenschmidt , Paul Mundt , Thomas Gleixner , Ingo Molnar , Peter Zijlstra , "Rafael J. Wysocki" , Daniel Lezcano Subject: [PATCH 4/9] idle: move the cpuidle entry point to the generic idle loop Date: Mon, 27 Jan 2014 01:08:19 -0500 Message-id: <1390802904-28399-5-git-send-email-nicolas.pitre@linaro.org> X-Mailer: git-send-email 1.8.4.108.g55ea5f6 In-reply-to: <1390802904-28399-1-git-send-email-nicolas.pitre@linaro.org> References: <1390802904-28399-1-git-send-email-nicolas.pitre@linaro.org> Cc: linaro-kernel@lists.linaro.org, linux-pm@vger.kernel.org, linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.16 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" In order to integrate cpuidle with the scheduler, we must have a better proximity in the core code with what cpuidle is doing and not delegate such interaction to arch code. Architectures implementing arch_cpu_idle() should simply enter a cheap idle mode in the absence of a proper cpuidle driver. Signed-off-by: Nicolas Pitre Acked-by: Daniel Lezcano --- kernel/cpu/idle.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/kernel/cpu/idle.c b/kernel/cpu/idle.c index 4e327e211b..a6f40ad9f8 100644 --- a/kernel/cpu/idle.c +++ b/kernel/cpu/idle.c @@ -3,6 +3,7 @@ */ #include #include +#include #include #include #include @@ -94,7 +95,8 @@ static void cpu_idle_loop(void) if (!current_clr_polling_and_test()) { stop_critical_timings(); rcu_idle_enter(); - arch_cpu_idle(); + if (cpuidle_idle_call()) + arch_cpu_idle(); WARN_ON_ONCE(irqs_disabled()); rcu_idle_exit(); start_critical_timings();