From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932761Ab3CUV6K (ORCPT ); Thu, 21 Mar 2013 17:58:10 -0400 Received: from www.linutronix.de ([62.245.132.108]:33169 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932275Ab3CUVxN (ORCPT ); Thu, 21 Mar 2013 17:53:13 -0400 Message-Id: <20130321215234.535485189@linutronix.de> User-Agent: quilt/0.48-1 Date: Thu, 21 Mar 2013 21:53:11 -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 , Geert Uytterhoeven Subject: [patch 19/34] m68k: Use generic idle loop References: <20130321214930.752934102@linutronix.de> Content-Disposition: inline; filename=m68k-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: Geert Uytterhoeven --- arch/m68k/Kconfig | 1 + arch/m68k/kernel/process.c | 32 ++++---------------------------- 2 files changed, 5 insertions(+), 28 deletions(-) Index: linux-2.6/arch/m68k/Kconfig =================================================================== --- linux-2.6.orig/arch/m68k/Kconfig +++ linux-2.6/arch/m68k/Kconfig @@ -6,6 +6,7 @@ config M68K select HAVE_DEBUG_BUGVERBOSE select HAVE_GENERIC_HARDIRQS select GENERIC_IRQ_SHOW + select GENERIC_IDLE_LOOP select GENERIC_ATOMIC64 select HAVE_UID16 select VIRT_TO_BUS Index: linux-2.6/arch/m68k/kernel/process.c =================================================================== --- linux-2.6.orig/arch/m68k/kernel/process.c +++ linux-2.6/arch/m68k/kernel/process.c @@ -51,40 +51,16 @@ unsigned long thread_saved_pc(struct tas return sw->retpc; } -/* - * The idle loop on an m68k.. - */ -static void default_idle(void) +void arch_cpu_idle(void) { - if (!need_resched()) #if defined(MACH_ATARI_ONLY) - /* block out HSYNC on the atari (falcon) */ - __asm__("stop #0x2200" : : : "cc"); + /* block out HSYNC on the atari (falcon) */ + __asm__("stop #0x2200" : : : "cc"); #else - __asm__("stop #0x2000" : : : "cc"); + __asm__("stop #0x2000" : : : "cc"); #endif } -void (*idle)(void) = default_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) -{ - /* endless idle loop with no priority at all */ - while (1) { - rcu_idle_enter(); - while (!need_resched()) - idle(); - rcu_idle_exit(); - schedule_preempt_disabled(); - } -} - void machine_restart(char * __unused) { if (mach_reset)