From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751514AbdJEMpP (ORCPT ); Thu, 5 Oct 2017 08:45:15 -0400 Received: from mail-wm0-f41.google.com ([74.125.82.41]:52575 "EHLO mail-wm0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751449AbdJEMoz (ORCPT ); Thu, 5 Oct 2017 08:44:55 -0400 X-Google-Smtp-Source: AOwi7QDi/zgP4tB0m5tM4cKb0vFuC34OFpsctUFalrsR92B0Pr5ecpXIyim9YV1jOb40r32Jl+WMBw== From: Bartosz Golaszewski To: Thomas Gleixner , Marc Zyngier , Jonathan Cameron , Lars-Peter Clausen Cc: linux-kernel@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH 3/3] irq/irq_sim: implement irq_sim_irq2offset() Date: Thu, 5 Oct 2017 14:44:46 +0200 Message-Id: <20171005124446.26265-4-brgl@bgdev.pl> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20171005124446.26265-1-brgl@bgdev.pl> References: <20171005124446.26265-1-brgl@bgdev.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a routine allowing to retrieve the offset corresponding with an allocated interrupt number from an irq_sim object. Signed-off-by: Bartosz Golaszewski --- include/linux/irq_sim.h | 1 + kernel/irq/irq_sim.c | 15 +++++++++++++++ 2 files changed, 16 insertions(+) diff --git a/include/linux/irq_sim.h b/include/linux/irq_sim.h index 246f593face8..e9768ca81e3e 100644 --- a/include/linux/irq_sim.h +++ b/include/linux/irq_sim.h @@ -41,5 +41,6 @@ void irq_sim_fini(struct irq_sim *sim); void irq_sim_fire(struct irq_sim *sim, unsigned int offset); int irq_sim_irqnum(struct irq_sim *sim, unsigned int offset); int irq_sim_baseirq(struct irq_sim *sim); +unsigned int irq_sim_irq2offset(struct irq_sim *sim, int irq); #endif /* _LINUX_IRQ_SIM_H */ diff --git a/kernel/irq/irq_sim.c b/kernel/irq/irq_sim.c index 1be10d0e295f..9a9a1bc8853c 100644 --- a/kernel/irq/irq_sim.c +++ b/kernel/irq/irq_sim.c @@ -174,3 +174,18 @@ int irq_sim_baseirq(struct irq_sim *sim) return irq_sim_irqnum(sim, 0); } EXPORT_SYMBOL_GPL(irq_sim_baseirq); + +/** + * irq_sim_irq2offset - Get the offset of an allocated interrupt. + * + * @sim: The interrupt simulator object. + * irq: Allocated interrupt number. + * + * Perform a reverse lookup for the interrupt number and return its offset in + * the array allocated by sim_irq. + */ +unsigned int irq_sim_irq2offset(struct irq_sim *sim, int irq) +{ + return irq - sim->irq_base; +} +EXPORT_SYMBOL_GPL(irq_sim_irq2offset); -- 2.13.2