From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754995AbZIVFk2 (ORCPT ); Tue, 22 Sep 2009 01:40:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754801AbZIVFk0 (ORCPT ); Tue, 22 Sep 2009 01:40:26 -0400 Received: from e28smtp06.in.ibm.com ([59.145.155.6]:58964 "EHLO e28smtp06.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754902AbZIVFkY (ORCPT ); Tue, 22 Sep 2009 01:40:24 -0400 Date: Tue, 22 Sep 2009 11:10:24 +0530 From: Arun R Bharadwaj To: Joel Schopp , Benjamin Herrenschmidt , Paul Mackerras , Peter Zijlstra , Ingo Molnar , Vaidyanathan Srinivasan , Dipankar Sarma , Balbir Singh , Gautham R Shenoy , Arun Bharadwaj Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [v5 RFC PATCH 6/7]: POWER: add a default_idle idle loop for POWER. Message-ID: <20090922054024.GG6417@linux.vnet.ibm.com> Reply-To: arun@linux.vnet.ibm.com References: <20090922053314.GA6417@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <20090922053314.GA6417@linux.vnet.ibm.com> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Arun R Bharadwaj [2009-09-22 11:03:14]: In arch/powerpc/kernel/idle.c create a default_idle() routine by moving the failover condition of the cpu_idle() idle loop. This is needed by cpuidle infrastructure to call default_idle when other idle routines are not yet registered. Functionality remains the same, but the code is slightly moved around. Signed-off-by: Arun R Bharadwaj --- arch/powerpc/Kconfig | 3 +++ arch/powerpc/include/asm/system.h | 1 + arch/powerpc/kernel/idle.c | 6 ++++++ 3 files changed, 10 insertions(+) Index: linux.trees.git/arch/powerpc/Kconfig =================================================================== --- linux.trees.git.orig/arch/powerpc/Kconfig +++ linux.trees.git/arch/powerpc/Kconfig @@ -88,6 +88,9 @@ config ARCH_HAS_ILOG2_U64 bool default y if 64BIT +config ARCH_HAS_DEFAULT_IDLE + def_bool y + config GENERIC_HWEIGHT bool default y Index: linux.trees.git/arch/powerpc/include/asm/system.h =================================================================== --- linux.trees.git.orig/arch/powerpc/include/asm/system.h +++ linux.trees.git/arch/powerpc/include/asm/system.h @@ -218,6 +218,7 @@ extern unsigned long klimit; extern void *alloc_maybe_bootmem(size_t size, gfp_t mask); extern void *zalloc_maybe_bootmem(size_t size, gfp_t mask); +extern void default_idle(void); extern int powersave_nap; /* set if nap mode can be used in idle loop */ /* Index: linux.trees.git/arch/powerpc/kernel/idle.c =================================================================== --- linux.trees.git.orig/arch/powerpc/kernel/idle.c +++ linux.trees.git/arch/powerpc/kernel/idle.c @@ -94,6 +94,12 @@ void cpu_idle(void) } } +void default_idle(void) +{ + HMT_low(); + HMT_very_low(); +} + int powersave_nap; #ifdef CONFIG_SYSCTL