From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759614AbZBZVwm (ORCPT ); Thu, 26 Feb 2009 16:52:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755700AbZBZVwb (ORCPT ); Thu, 26 Feb 2009 16:52:31 -0500 Received: from smtp.wellnetcz.com ([212.24.148.102]:59825 "EHLO smtp.wellnetcz.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755531AbZBZVwa (ORCPT ); Thu, 26 Feb 2009 16:52:30 -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 v2 3/4] x86_32: apic/es7000_32, fix cpu_mask_to_apicid Date: Thu, 26 Feb 2009 22:50:44 +0100 Message-Id: <1235685044-7463-1-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: <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 BAD_APICID on failure. While at it, convert it to for_each_cpu. [v2] - remove omitted apicid initial assignment Signed-off-by: Jiri Slaby Cc: Thomas Gleixner Cc: Ingo Molnar Cc: H. Peter Anvin --- arch/x86/kernel/apic/es7000_32.c | 30 ++++++++++-------------------- 1 files changed, 10 insertions(+), 20 deletions(-) diff --git a/arch/x86/kernel/apic/es7000_32.c b/arch/x86/kernel/apic/es7000_32.c index 6c15126..d2ab096 100644 --- a/arch/x86/kernel/apic/es7000_32.c +++ b/arch/x86/kernel/apic/es7000_32.c @@ -567,32 +567,22 @@ static int es7000_check_phys_apicid_present(int cpu_physical_apicid) static unsigned int es7000_cpu_mask_to_apicid(const cpumask_t *cpumask) { - unsigned int cpu, num_bits_set, cpus_found = 0; - int apicid; + unsigned int round = 0; + int cpu, uninitialized_var(apicid); - num_bits_set = cpumask_weight(cpumask); - /* Return id to all */ - if (num_bits_set == nr_cpu_ids) - return es7000_cpu_to_logical_apicid(0); /* - * The cpus in the mask must all be on the apic cluster. If are not - * on the same apicid cluster return default value of target_cpus(): + * The cpus in the mask must all be on the apic cluster. */ - cpu = cpumask_first(cpumask); - apicid = es7000_cpu_to_logical_apicid(cpu); - while (cpus_found < num_bits_set) { - if (cpumask_test_cpu(cpu, cpumask)) { - int new_apicid = es7000_cpu_to_logical_apicid(cpu); + for_each_cpu(cpu, cpumask) { + int new_apicid = es7000_cpu_to_logical_apicid(cpu); - if (APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) { - WARN(1, "Not a valid mask!"); + if (round && APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) { + WARN(1, "Not a valid mask!"); - return es7000_cpu_to_logical_apicid(0); - } - apicid = new_apicid; - cpus_found++; + return BAD_APICID; } - cpu++; + apicid = new_apicid; + round++; } return apicid; } -- 1.6.1.3