From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752111AbaHUOxO (ORCPT ); Thu, 21 Aug 2014 10:53:14 -0400 Received: from mail-we0-f169.google.com ([74.125.82.169]:63664 "EHLO mail-we0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751016AbaHUOxM (ORCPT ); Thu, 21 Aug 2014 10:53:12 -0400 From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Catalin Iacob , Dave Jones , Ingo Molnar , "Paul E. McKenney" , Peter Zijlstra , Thomas Gleixner Subject: [RFC PATCH 5/9] x86: Tell irq work about self IPI support Date: Thu, 21 Aug 2014 16:52:53 +0200 Message-Id: <1408632777-3348-6-git-send-email-fweisbec@gmail.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1408632777-3348-1-git-send-email-fweisbec@gmail.com> References: <1408632777-3348-1-git-send-email-fweisbec@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org x86 supports irq work when local apic is available. This is partly known on runtime so lets implement arch_irq_work_has_own_interrupt() accordingly. This should be safely called after setup_arch(). Cc: Catalin Iacob Cc: Dave Jones Cc: Ingo Molnar Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: Thomas Gleixner Signed-off-by: Frederic Weisbecker --- arch/x86/kernel/irq_work.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/x86/kernel/irq_work.c b/arch/x86/kernel/irq_work.c index 54f60a2..b5f8fff 100644 --- a/arch/x86/kernel/irq_work.c +++ b/arch/x86/kernel/irq_work.c @@ -38,6 +38,11 @@ __visible void smp_trace_irq_work_interrupt(struct pt_regs *regs) exiting_irq(); } +int __init arch_irq_work_has_own_interrupt(void) +{ + return cpu_has_apic; +} + void arch_irq_work_raise(void) { if (!cpu_has_apic) -- 1.8.3.1