From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759084AbZBZVqv (ORCPT ); Thu, 26 Feb 2009 16:46:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755620AbZBZVqJ (ORCPT ); Thu, 26 Feb 2009 16:46:09 -0500 Received: from smtp.wellnetcz.com ([212.24.148.102]:42450 "EHLO smtp.wellnetcz.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751335AbZBZVqG (ORCPT ); Thu, 26 Feb 2009 16:46:06 -0500 From: Jiri Slaby To: mingo@redhat.com Cc: x86@kernel.org, linux-kernel@vger.kernel.org, Jiri Slaby , Thomas Gleixner , "H. Peter Anvin" Subject: [PATCH 4/4] x86_32: apic/summit_32, fix cpu_mask_to_apicid Date: Thu, 26 Feb 2009 22:45:32 +0100 Message-Id: <1235684732-5991-4-git-send-email-jirislaby@gmail.com> X-Mailer: git-send-email 1.6.1.3 In-Reply-To: <1235684732-5991-3-git-send-email-jirislaby@gmail.com> References: <20090225111002.GA15453@elte.hu> <1235684732-5991-1-git-send-email-jirislaby@gmail.com> <1235684732-5991-2-git-send-email-jirislaby@gmail.com> <1235684732-5991-3-git-send-email-jirislaby@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Perform same-cluster checking even for masks with all (nr_cpu_ids) bits set and report correct apicid on success instead. While at it, convert it to for_each_cpu and newer cpumask api. Signed-off-by: Jiri Slaby Cc: Thomas Gleixner Cc: Ingo Molnar Cc: H. Peter Anvin --- arch/x86/kernel/apic/summit_32.c | 30 +++++++++--------------------- 1 files changed, 9 insertions(+), 21 deletions(-) diff --git a/arch/x86/kernel/apic/summit_32.c b/arch/x86/kernel/apic/summit_32.c index 32838b5..95916dc 100644 --- a/arch/x86/kernel/apic/summit_32.c +++ b/arch/x86/kernel/apic/summit_32.c @@ -291,33 +291,21 @@ static int summit_check_phys_apicid_present(int boot_cpu_physical_apicid) static unsigned int summit_cpu_mask_to_apicid(const cpumask_t *cpumask) { - int cpus_found = 0; - int num_bits_set; - int apicid; - int cpu; + unsigned int round = 0; + int cpu, apicid = 0; - num_bits_set = cpus_weight(*cpumask); - if (num_bits_set >= nr_cpu_ids) - return BAD_APICID; /* * The cpus in the mask must all be on the apic cluster. */ - cpu = first_cpu(*cpumask); - apicid = summit_cpu_to_logical_apicid(cpu); - - while (cpus_found < num_bits_set) { - if (cpu_isset(cpu, *cpumask)) { - int new_apicid = summit_cpu_to_logical_apicid(cpu); + for_each_cpu(cpu, cpumask) { + int new_apicid = summit_cpu_to_logical_apicid(cpu); - if (APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) { - printk("%s: Not a valid mask!\n", __func__); - - return BAD_APICID; - } - apicid = apicid | new_apicid; - cpus_found++; + if (round && APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) { + printk("%s: Not a valid mask!\n", __func__); + return BAD_APICID; } - cpu++; + apicid |= new_apicid; + round++; } return apicid; } -- 1.6.1.3