From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933511AbaEGPqw (ORCPT ); Wed, 7 May 2014 11:46:52 -0400 Received: from www.linutronix.de ([62.245.132.108]:48670 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752250AbaEGPoF (ORCPT ); Wed, 7 May 2014 11:44:05 -0400 Message-Id: <20140507154339.811205235@linutronix.de> User-Agent: quilt/0.60-1 Date: Wed, 07 May 2014 15:44:20 -0000 From: Thomas Gleixner To: LKML Cc: Ingo Molnar , Peter Anvin , Tony Luck , Peter Zijlstra , Martin Schwidefsky , Heiko Carstens Subject: [patch 27/32] s390: Avoid call to irq_reserve_irqs() References: <20140507153622.703412101@linutronix.de> Content-Disposition: inline; filename=s390-avoid-call-to-reserve-irq.patch X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There is no need to mark the lower interrupts as reserved in order to exclude them from dynamic allocation. Provide arch_dynirq_lower_bound() to exclude the lower space. Signed-off-by: Thomas Gleixner Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: linux390@de.ibm.com --- arch/s390/kernel/irq.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) Index: tip/arch/s390/kernel/irq.c =================================================================== --- tip.orig/arch/s390/kernel/irq.c +++ tip/arch/s390/kernel/irq.c @@ -92,7 +92,6 @@ static const struct irq_class irqclass_s void __init init_IRQ(void) { - irq_reserve_irqs(0, THIN_INTERRUPT); init_cio_interrupts(); init_airq_interrupts(); init_ext_interrupts(); @@ -151,6 +150,11 @@ out: return 0; } +unsigned int arch_dynirq_lower_bound(unsigned int from) +{ + return from < THIN_INTERRUPT ? THIN_INTERRUPT : from; +} + /* * Switch to the asynchronous interrupt stack for softirq execution. */