From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752722AbZK3Kyv (ORCPT ); Mon, 30 Nov 2009 05:54:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751806AbZK3Kyv (ORCPT ); Mon, 30 Nov 2009 05:54:51 -0500 Received: from mx1.redhat.com ([209.132.183.28]:1934 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751208AbZK3Kyu (ORCPT ); Mon, 30 Nov 2009 05:54:50 -0500 From: Avi Kivity To: Ingo Molnar , "H. Peter Anvin" Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Subject: [PATCH] core: clean up user return notifers use of per_cpu Date: Mon, 30 Nov 2009 12:54:51 +0200 Message-Id: <1259578491-4589-1-git-send-email-avi@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Instead of using per_cpu(..., raw_smp_processor_id()), use __get_cpu_var(...). Signed-off-by: Avi Kivity --- kernel/user-return-notifier.c | 6 ++---- 1 files changed, 2 insertions(+), 4 deletions(-) diff --git a/kernel/user-return-notifier.c b/kernel/user-return-notifier.c index 03e2d6f..eb27fd3 100644 --- a/kernel/user-return-notifier.c +++ b/kernel/user-return-notifier.c @@ -6,8 +6,6 @@ static DEFINE_PER_CPU(struct hlist_head, return_notifier_list); -#define URN_LIST_HEAD per_cpu(return_notifier_list, raw_smp_processor_id()) - /* * Request a notification when the current cpu returns to userspace. Must be * called in atomic context. The notifier will also be called in atomic @@ -16,7 +14,7 @@ static DEFINE_PER_CPU(struct hlist_head, return_notifier_list); void user_return_notifier_register(struct user_return_notifier *urn) { set_tsk_thread_flag(current, TIF_USER_RETURN_NOTIFY); - hlist_add_head(&urn->link, &URN_LIST_HEAD); + hlist_add_head(&urn->link, &__get_cpu_var(return_notifier_list)); } EXPORT_SYMBOL_GPL(user_return_notifier_register); @@ -27,7 +25,7 @@ EXPORT_SYMBOL_GPL(user_return_notifier_register); void user_return_notifier_unregister(struct user_return_notifier *urn) { hlist_del(&urn->link); - if (hlist_empty(&URN_LIST_HEAD)) + if (hlist_empty(&__get_cpu_var(return_notifier_list))) clear_tsk_thread_flag(current, TIF_USER_RETURN_NOTIFY); } EXPORT_SYMBOL_GPL(user_return_notifier_unregister); -- 1.6.5.2