From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1D208C433F5 for ; Mon, 6 Dec 2021 14:31:34 +0000 (UTC) Received: from localhost ([::1]:35754 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1muF1h-0008Hh-6l for qemu-devel@archiver.kernel.org; Mon, 06 Dec 2021 09:31:33 -0500 Received: from eggs.gnu.org ([209.51.188.92]:51642) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1muExJ-0007Fc-Hy for qemu-devel@nongnu.org; Mon, 06 Dec 2021 09:27:01 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:44674) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1muExE-0002xJ-Lz for qemu-devel@nongnu.org; Mon, 06 Dec 2021 09:26:59 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1638800816; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=mG/4/c6JahFepUvT35nbK2boHd5C0dHum/iIdDDWEzU=; b=a5y+UTyW4bkyEusbs9xrxmi8x5fmhhrDiYP4FTX5okgdZ9DV5sWiA2fYM9oiV2Tjem/7NG KgrhBPLVYwD/QBxNa9w7Q9jwUYhtgc12l3jgra4AfHJfYHNiLWJfP5NgH4fOeMLKDot3tW /A/st19SENXdBQhAX8vuMQam55C7r4g= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-372-GT_yvqc7N1qs5MX5y5Qq7A-1; Mon, 06 Dec 2021 09:26:53 -0500 X-MC-Unique: GT_yvqc7N1qs5MX5y5Qq7A-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id D9FEC81EE60; Mon, 6 Dec 2021 14:26:51 +0000 (UTC) Received: from localhost (unknown [10.39.193.226]) by smtp.corp.redhat.com (Postfix) with ESMTP id 780315F4E1; Mon, 6 Dec 2021 14:26:51 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org Subject: [RFC v3 2/4] util/async: replace __thread with QEMU TLS macros Date: Mon, 6 Dec 2021 14:26:30 +0000 Message-Id: <20211206142632.116925-3-stefanha@redhat.com> In-Reply-To: <20211206142632.116925-1-stefanha@redhat.com> References: <20211206142632.116925-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=stefanha@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" Received-SPF: pass client-ip=170.10.133.124; envelope-from=stefanha@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -33 X-Spam_score: -3.4 X-Spam_bar: --- X-Spam_report: (-3.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.619, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fam Zheng , fweimer@redhat.com, thuth@redhat.com, Daniel Berrange , qemu-block@nongnu.org, Richard Henderson , Stefan Hajnoczi , Paolo Bonzini , Kevin Wolf , Warner Losh , sguelton@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" QEMU TLS macros must be used to make TLS variables safe with coroutines. Signed-off-by: Stefan Hajnoczi --- util/async.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/util/async.c b/util/async.c index 6f6717a34b..ddd9f24419 100644 --- a/util/async.c +++ b/util/async.c @@ -32,6 +32,7 @@ #include "qemu/rcu_queue.h" #include "block/raw-aio.h" #include "qemu/coroutine_int.h" +#include "qemu/coroutine-tls.h" #include "trace.h" /***********************************************************/ @@ -669,12 +670,13 @@ void aio_context_release(AioContext *ctx) qemu_rec_mutex_unlock(&ctx->lock); } -static __thread AioContext *my_aiocontext; +QEMU_DEFINE_STATIC_CO_TLS(AioContext *, my_aiocontext) AioContext *qemu_get_current_aio_context(void) { - if (my_aiocontext) { - return my_aiocontext; + AioContext *ctx = get_my_aiocontext(); + if (ctx) { + return ctx; } if (qemu_mutex_iothread_locked()) { /* Possibly in a vCPU thread. */ @@ -685,6 +687,6 @@ AioContext *qemu_get_current_aio_context(void) void qemu_set_current_aio_context(AioContext *ctx) { - assert(!my_aiocontext); - my_aiocontext = ctx; + assert(!get_my_aiocontext()); + set_my_aiocontext(ctx); } -- 2.33.1