From patchwork Thu Dec 10 19:25:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 11966403 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B706DC433FE for ; Thu, 10 Dec 2020 20:13:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 80FFF2332A for ; Thu, 10 Dec 2020 20:13:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404632AbgLJUNC (ORCPT ); Thu, 10 Dec 2020 15:13:02 -0500 Received: from Galois.linutronix.de ([193.142.43.55]:56122 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2393381AbgLJTm7 (ORCPT ); Thu, 10 Dec 2020 14:42:59 -0500 Message-Id: <20201210194042.548936472@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1607629336; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=wCqGjbHBcSlcHWGOV/dAhxvR97JcFGNX9psmcROoCq0=; b=2Z0Q8lbqw2d3iK0lyMTfu6GGSIFMkE/mgVP/hAGnWOqxBRMxf5MtZTpRPSPBXz/boYfgYn ST6oe0NetpTwhOSarLLIdAuYLS1gydE77MQVYVcY3FouLrWnl5si1eWOJ4F95yCk0G9X60 1VL1Pvt1tpdt2jzvXhHk1B3J4gqT2I16payytnnsVM1ae0GkKHVOkzm3mG/NvUjNMZDZ8b Y9sC2WWQtJSCM32DjS16A3YMAUHnAI48PATHpxuESAMuGdCfbbEW6ICvvlfOLWvLQ9S/jh Z+QD95xpqockzbshrRUV6G0e1FqEFRsR9IAhKZG5jK6CihEBgYA5K4ONks8gvw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1607629336; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=wCqGjbHBcSlcHWGOV/dAhxvR97JcFGNX9psmcROoCq0=; b=7JxYxk/ThtDXDjNM4lO0Kv6ZI0VZ4wL2ccu9YMROMO3FB+Dn8roKKZsGAALM1EdgllUWzl ydzvbEXlvqdXI/CQ== Date: Thu, 10 Dec 2020 20:25:37 +0100 From: Thomas Gleixner To: LKML Cc: Peter Zijlstra , Marc Zyngier , "James E.J. Bottomley" , Helge Deller , afzal mohammed , linux-parisc@vger.kernel.org, Russell King , linux-arm-kernel@lists.infradead.org, Mark Rutland , Catalin Marinas , Will Deacon , Christian Borntraeger , Heiko Carstens , linux-s390@vger.kernel.org, Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , David Airlie , Daniel Vetter , Pankaj Bharadiya , Chris Wilson , Wambui Karuga , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, Tvrtko Ursulin , Linus Walleij , linux-gpio@vger.kernel.org, Lee Jones , Jon Mason , Dave Jiang , Allen Hubbe , linux-ntb@googlegroups.com, Lorenzo Pieralisi , Rob Herring , Bjorn Helgaas , Michal Simek , linux-pci@vger.kernel.org, Karthikeyan Mitran , Hou Zhiqiang , Tariq Toukan , "David S. Miller" , Jakub Kicinski , netdev@vger.kernel.org, linux-rdma@vger.kernel.org, Saeed Mahameed , Leon Romanovsky , Boris Ostrovsky , Juergen Gross , Stefano Stabellini , xen-devel@lists.xenproject.org Subject: [patch 01/30] genirq: Move irq_has_action() into core code References: <20201210192536.118432146@linutronix.de> MIME-Version: 1.0 Content-transfer-encoding: 8-bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This function uses irq_to_desc() and is going to be used by modules to replace the open coded irq_to_desc() (ab)usage. The final goal is to remove the export of irq_to_desc() so driver cannot fiddle with it anymore. Move it into the core code and fixup the usage sites to include the proper header. Signed-off-by: Thomas Gleixner --- arch/alpha/kernel/sys_jensen.c | 2 +- arch/x86/kernel/topology.c | 1 + include/linux/interrupt.h | 1 + include/linux/irqdesc.h | 7 +------ kernel/irq/manage.c | 17 +++++++++++++++++ 5 files changed, 21 insertions(+), 7 deletions(-) --- a/arch/alpha/kernel/sys_jensen.c +++ b/arch/alpha/kernel/sys_jensen.c @@ -7,7 +7,7 @@ * * Code supporting the Jensen. */ - +#include #include #include #include --- a/arch/x86/kernel/topology.c +++ b/arch/x86/kernel/topology.c @@ -25,6 +25,7 @@ * * Send feedback to */ +#include #include #include #include --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -232,6 +232,7 @@ extern void devm_free_irq(struct device # define local_irq_enable_in_hardirq() local_irq_enable() #endif +bool irq_has_action(unsigned int irq); extern void disable_irq_nosync(unsigned int irq); extern bool disable_hardirq(unsigned int irq); extern void disable_irq(unsigned int irq); --- a/include/linux/irqdesc.h +++ b/include/linux/irqdesc.h @@ -179,12 +179,7 @@ int handle_domain_nmi(struct irq_domain /* Test to see if a driver has successfully requested an irq */ static inline int irq_desc_has_action(struct irq_desc *desc) { - return desc->action != NULL; -} - -static inline int irq_has_action(unsigned int irq) -{ - return irq_desc_has_action(irq_to_desc(irq)); + return desc && desc->action != NULL; } /** --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -2752,3 +2752,20 @@ int irq_set_irqchip_state(unsigned int i return err; } EXPORT_SYMBOL_GPL(irq_set_irqchip_state); + +/** + * irq_has_action - Check whether an interrupt is requested + * @irq: The linux irq number + * + * Returns: A snapshot of the current state + */ +bool irq_has_action(unsigned int irq) +{ + bool res; + + rcu_read_lock(); + res = irq_desc_has_action(irq_to_desc(irq)); + rcu_read_unlock(); + return res; +} +EXPORT_SYMBOL_GPL(irq_has_action);