From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932291Ab3CUVxN (ORCPT ); Thu, 21 Mar 2013 17:53:13 -0400 Received: from www.linutronix.de ([62.245.132.108]:33115 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932204Ab3CUVxJ (ORCPT ); Thu, 21 Mar 2013 17:53:09 -0400 Message-Id: <20130321215234.217235264@linutronix.de> User-Agent: quilt/0.48-1 Date: Thu, 21 Mar 2013 21:53:07 -0000 From: Thomas Gleixner To: LKML Cc: linux-arch@vger.kernel.org, Linus Torvalds , Andrew Morton , Rusty Russell , Paul McKenney , Ingo Molnar , Peter Zijlstra , "Srivatsa S. Bhat" , Magnus Damm , David Howells Subject: [patch 14/34] frv: Use generic idle loop References: <20130321214930.752934102@linutronix.de> Content-Disposition: inline; filename=frv-use-generic-idle-loop.patch X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Thomas Gleixner Cc: David Howells --- arch/frv/Kconfig | 1 + arch/frv/kernel/process.c | 27 +++++---------------------- 2 files changed, 6 insertions(+), 22 deletions(-) Index: linux-2.6/arch/frv/Kconfig =================================================================== --- linux-2.6.orig/arch/frv/Kconfig +++ linux-2.6/arch/frv/Kconfig @@ -8,6 +8,7 @@ config FRV select HAVE_GENERIC_HARDIRQS select VIRT_TO_BUS select GENERIC_IRQ_SHOW + select GENERIC_IDLE_LOOP select HAVE_DEBUG_BUGVERBOSE select ARCH_HAVE_NMI_SAFE_CMPXCHG select GENERIC_CPU_DEVICES Index: linux-2.6/arch/frv/kernel/process.c =================================================================== --- linux-2.6.orig/arch/frv/kernel/process.c +++ linux-2.6/arch/frv/kernel/process.c @@ -59,29 +59,12 @@ static void core_sleep_idle(void) mb(); } -void (*idle)(void) = core_sleep_idle; - -/* - * The idle thread. There's no useful work to be - * done, so just try to conserve power and have a - * low exit latency (ie sit in a loop waiting for - * somebody to say that they'd like to reschedule) - */ -void cpu_idle(void) +void arch_cpu_idle(void) { - /* endless idle loop with no priority at all */ - while (1) { - rcu_idle_enter(); - while (!need_resched()) { - check_pgt_cache(); - - if (!frv_dma_inprogress && idle) - idle(); - } - rcu_idle_exit(); - - schedule_preempt_disabled(); - } + if (!frv_dma_inprogress) + core_sleep_idle(); + else + local_irq_enable(); } void machine_restart(char * __unused)