From patchwork Fri Jan 3 00:05:44 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinghai Lu X-Patchwork-Id: 3428821 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 5CE94C02DC for ; Fri, 3 Jan 2014 00:18:50 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8585B20173 for ; Fri, 3 Jan 2014 00:18:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8F6F520163 for ; Fri, 3 Jan 2014 00:18:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753689AbaACAHP (ORCPT ); Thu, 2 Jan 2014 19:07:15 -0500 Received: from userp1040.oracle.com ([156.151.31.81]:23515 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751864AbaACAHM (ORCPT ); Thu, 2 Jan 2014 19:07:12 -0500 Received: from acsinet21.oracle.com (acsinet21.oracle.com [141.146.126.237]) by userp1040.oracle.com (Sentrion-MTA-4.3.1/Sentrion-MTA-4.3.1) with ESMTP id s0305dYO029725 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Fri, 3 Jan 2014 00:05:40 GMT Received: from aserz7022.oracle.com (aserz7022.oracle.com [141.146.126.231]) by acsinet21.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id s0305cBK018542 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Fri, 3 Jan 2014 00:05:38 GMT Received: from abhmp0006.oracle.com (abhmp0006.oracle.com [141.146.116.12]) by aserz7022.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id s0305bmq022341; Fri, 3 Jan 2014 00:05:37 GMT Received: from linux-siqj.site (/10.132.126.191) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 02 Jan 2014 16:05:37 -0800 From: Yinghai Lu To: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Tony Luck , Bjorn Helgaas , "Rafael J. Wysocki" Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, Yinghai Lu , Konrad Rzeszutek Wilk , Sebastian Andrzej Siewior , Joerg Roedel Subject: [PATCH v5 12/33] x86, irq: Convert irq_2_pin list to generic list Date: Thu, 2 Jan 2014 16:05:44 -0800 Message-Id: <1388707565-16535-13-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1388707565-16535-1-git-send-email-yinghai@kernel.org> References: <1388707565-16535-1-git-send-email-yinghai@kernel.org> X-Source-IP: acsinet21.oracle.com [141.146.126.237] Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Spam-Status: No, score=-7.4 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Now irq_2_pin list is own grown list for ioapic irq/pin tracking. We can use generic list to replace it so we could use generic helper functions to operate it. Also make free_irq_cfg() free irq_2_pin list to support coming ioapic hotplug. Signed-off-by: Yinghai Lu Cc: Konrad Rzeszutek Wilk Cc: Sebastian Andrzej Siewior Cc: Joerg Roedel --- arch/x86/include/asm/hw_irq.h | 2 +- arch/x86/kernel/apic/io_apic.c | 22 ++++++++++++---------- 2 files changed, 13 insertions(+), 11 deletions(-) diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h index cba45d9..eb0907e 100644 --- a/arch/x86/include/asm/hw_irq.h +++ b/arch/x86/include/asm/hw_irq.h @@ -139,7 +139,7 @@ struct irq_2_irte { * Most irqs are mapped 1:1 with pins. */ struct irq_cfg { - struct irq_pin_list *irq_2_pin; + struct list_head irq_2_pin; cpumask_var_t domain; cpumask_var_t old_domain; u8 vector; diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 86d5466..b943012 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -66,7 +66,7 @@ #define __apicdebuginit(type) static type __init #define for_each_irq_pin(entry, head) \ - for (entry = head; entry; entry = entry->next) + list_for_each_entry(entry, &head, list) /* * Is the SiS APIC rmw bug present ? @@ -176,8 +176,8 @@ void mp_save_irq(struct mpc_intsrc *m) } struct irq_pin_list { + struct list_head list; int apic, pin; - struct irq_pin_list *next; }; static struct irq_pin_list *alloc_irq_pin_list(int node) @@ -213,6 +213,7 @@ int __init arch_early_irq_init(void) irq_reserve_irqs(0, legacy_pic->nr_legacy_irqs); for (i = 0; i < count; i++) { + INIT_LIST_HEAD(&cfg[i].irq_2_pin); irq_set_chip_data(i, &cfg[i]); zalloc_cpumask_var_node(&cfg[i].domain, GFP_KERNEL, node); zalloc_cpumask_var_node(&cfg[i].old_domain, GFP_KERNEL, node); @@ -245,6 +246,7 @@ static struct irq_cfg *alloc_irq_cfg(unsigned int irq, int node) goto out_cfg; if (!zalloc_cpumask_var_node(&cfg->old_domain, GFP_KERNEL, node)) goto out_domain; + INIT_LIST_HEAD(&cfg->irq_2_pin); return cfg; out_domain: free_cpumask_var(cfg->domain); @@ -255,11 +257,15 @@ out_cfg: static void free_irq_cfg(unsigned int at, struct irq_cfg *cfg) { + struct irq_pin_list *entry, *tmp; + if (!cfg) return; irq_set_chip_data(at, NULL); free_cpumask_var(cfg->domain); free_cpumask_var(cfg->old_domain); + list_for_each_entry_safe(entry, tmp, &cfg->irq_2_pin, list) + kfree(entry); kfree(cfg); } @@ -420,15 +426,12 @@ static void ioapic_mask_entry(int apic, int pin) */ static int __add_pin_to_irq_node(struct irq_cfg *cfg, int node, int apic, int pin) { - struct irq_pin_list **last, *entry; + struct irq_pin_list *entry; /* don't allow duplicates */ - last = &cfg->irq_2_pin; - for_each_irq_pin(entry, cfg->irq_2_pin) { + for_each_irq_pin(entry, cfg->irq_2_pin) if (entry->apic == apic && entry->pin == pin) return 0; - last = &entry->next; - } entry = alloc_irq_pin_list(node); if (!entry) { @@ -439,7 +442,7 @@ static int __add_pin_to_irq_node(struct irq_cfg *cfg, int node, int apic, int pi entry->apic = apic; entry->pin = pin; - *last = entry; + list_add_tail(&entry->list, &cfg->irq_2_pin); return 0; } @@ -1627,8 +1630,7 @@ __apicdebuginit(void) print_IO_APICs(void) cfg = irq_get_chip_data(irq); if (!cfg) continue; - entry = cfg->irq_2_pin; - if (!entry) + if (list_empty(&cfg->irq_2_pin)) continue; printk(KERN_DEBUG "IRQ%d ", irq); for_each_irq_pin(entry, cfg->irq_2_pin)