From patchwork Tue Apr 21 17:34:59 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Graf X-Patchwork-Id: 6252221 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 026909F32B for ; Tue, 21 Apr 2015 17:35:29 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3CEE320254 for ; Tue, 21 Apr 2015 17:35:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 15ED120251 for ; Tue, 21 Apr 2015 17:35:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755622AbbDURfX (ORCPT ); Tue, 21 Apr 2015 13:35:23 -0400 Received: from cantor2.suse.de ([195.135.220.15]:38202 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754059AbbDURfV (ORCPT ); Tue, 21 Apr 2015 13:35:21 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 0E57BAC90; Tue, 21 Apr 2015 17:35:20 +0000 (UTC) From: Alexander Graf To: kvm-ppc@vger.kernel.org Cc: kvm@vger.kernel.org, pbonzini@redhat.com, "Suresh E. Warrier" Subject: [PULL 01/21] powerpc: Export __spin_yield Date: Tue, 21 Apr 2015 19:34:59 +0200 Message-Id: <1429637719-172312-2-git-send-email-agraf@suse.de> X-Mailer: git-send-email 1.7.12.4 In-Reply-To: <1429637719-172312-1-git-send-email-agraf@suse.de> References: <1429637719-172312-1-git-send-email-agraf@suse.de> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: "Suresh E. Warrier" Export __spin_yield so that the arch_spin_unlock() function can be invoked from a module. This will be required for modules where we want to take a lock that is also is acquired in hypervisor real mode. Because we want to avoid running any lockdep code (which may not be safe in real mode), this lock needs to be an arch_spinlock_t instead of a normal spinlock. Signed-off-by: Suresh Warrier Acked-by: Paul Mackerras Acked-by: Michael Ellerman Signed-off-by: Alexander Graf --- arch/powerpc/lib/locks.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/lib/locks.c b/arch/powerpc/lib/locks.c index 170a034..f7deebd 100644 --- a/arch/powerpc/lib/locks.c +++ b/arch/powerpc/lib/locks.c @@ -41,6 +41,7 @@ void __spin_yield(arch_spinlock_t *lock) plpar_hcall_norets(H_CONFER, get_hard_smp_processor_id(holder_cpu), yield_count); } +EXPORT_SYMBOL_GPL(__spin_yield); /* * Waiting for a read lock or a write lock on a rwlock...