Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762237AbYCSUBi (ORCPT ); Wed, 19 Mar 2008 16:01:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757009AbYCSTiI (ORCPT ); Wed, 19 Mar 2008 15:38:08 -0400 Received: from mx1.redhat.com ([66.187.233.31]:55887 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754757AbYCSTh7 (ORCPT ); Wed, 19 Mar 2008 15:37:59 -0400 From: Glauber de Oliveira Costa To: linux-kernel@vger.kernel.org Cc: akpm@linux-foundation.org, tglx@linutronix.de, mingo@elte.hu, ak@suse.de, Glauber Costa Subject: [PATCH 45/79] [PATCH] fix apic acking of irqs Date: Wed, 19 Mar 2008 14:25:40 -0300 Message-Id: <12059477792893-git-send-email-gcosta@redhat.com> X-Mailer: git-send-email 1.5.0.6 In-Reply-To: <12059477751776-git-send-email-gcosta@redhat.com> References: <12059475744092-git-send-email-gcosta@redhat.com> <1205947580526-git-send-email-gcosta@redhat.com> <12059475853453-git-send-email-gcosta@redhat.com> <12059475892790-git-send-email-gcosta@redhat.com> <12059475944070-git-send-email-gcosta@redhat.com> <12059475982810-git-send-email-gcosta@redhat.com> <12059476032561-git-send-email-gcosta@redhat.com> <1205947607406-git-send-email-gcosta@redhat.com> <12059476123203-git-send-email-gcosta@redhat.com> <12059476162900-git-send-email-gcosta@redhat.com> <12059476212769-git-send-email-gcosta@redhat.com> <1205947625472-git-send-email-gcosta@redhat.com> <12059476302473-git-send-email-gcosta@redhat.com> <12059476351524-git-send-email-gcosta@redhat.com> <12059476393279-git-send-email-gcosta@redhat.com> <12059476441057-git-send-email-gcosta@redhat.com> <12059476482875-git-send-email-gcosta@redhat.com> <12059476531095-git-send-email-gcosta@redhat.com> <1205947657993-git-send-email-gcosta@redhat.com> <1205947661385-git-send-email-g! costa@redhat.com> <12059476663034-git-send-email-gcosta@redhat.com> <12059476703608-git-send-email-gcosta@redhat.com> <1205947675605-git-send-email-gcosta@redhat.com> <12059476802159-git-send-email-gcosta@redhat.com> <12059476844196-git-send-email-gcosta@redhat.com> <12059476883852-git-send-email-gcosta@redhat.com> <12059476932397-git-send-email-gcosta@redhat.com> <12059476971309-git-send-email-gcosta@redhat.com> <1205947702588-git-send-email-gcosta@redhat.com> <12059477063046-git-send-email-gcosta@redhat.com> <12059477102394-git-send-email-gcosta@redhat.com> <12059477143205-git-send-email-gcosta@redhat.com> <1205947719906-git-send-email-gcosta@redhat.com> <12059477234148-git-send-email-gcosta@redhat.com> <12059477273855-git-send-email-gcosta@redhat.com> <1205947732309-git-send-email-gcosta@redhat.com> <12059477371787-git-send-email-gcosta@redhat.com> <12059477421707-git-send-email-gcosta@redhat.com> <12059477472416-git-send-email-gcosta@redhat.com> <12059477521176-git-send! -email-gcosta@redhat.com> <12059477561937-git-send-email-gcosta@redhat Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1099 Lines: 33 From: Glauber Costa EOI is a write-only register. Using write around will have the effect of reading it, which will make all subsequent reads of the ESR register to return an error code. It was unnotices for quite a while because main sources of reading the ESR register where done prior to apic interrupt enabling. Signed-off-by: Glauber Costa --- include/asm-x86/apic.h | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/include/asm-x86/apic.h b/include/asm-x86/apic.h index db5f750..0d6ea74 100644 --- a/include/asm-x86/apic.h +++ b/include/asm-x86/apic.h @@ -103,7 +103,7 @@ static inline void ack_APIC_irq(void) */ /* Docs say use 0 for future compatibility */ - apic_write_around(APIC_EOI, 0); + apic_write(APIC_EOI, 0); } extern int lapic_get_maxlvt(void); -- 1.5.0.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/