From patchwork Wed May 27 05:24:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11571833 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 58651912 for ; Wed, 27 May 2020 05:25:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 40AD4207ED for ; Wed, 27 May 2020 05:25:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="HgOzNOGA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729098AbgE0FZK (ORCPT ); Wed, 27 May 2020 01:25:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44734 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729093AbgE0FZI (ORCPT ); Wed, 27 May 2020 01:25:08 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5ABF9C03E96E; Tue, 26 May 2020 22:25:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=TB9a5RlSCttsRGqQbKXaUpDsmIDKmbhQMWP6LpH5XS4=; b=HgOzNOGAvq1hieB8BGbaYM8Yd6 OtocAuujspm6nkP05lUCMyukmzw/shOAkGR7H6vwElNxY37f5Gf6FH74JCcPV0KXohlfK46c5CIgq uKVpylnDhN13Tfwbx+8sF3cFuxHddwTW4sfegH7VWgZTbI3FlQh0trOMNHvm8ki30lCUyYaGnLCl9 MsfPEcsFZXBs3k0ckvvXDZ647AgGZTPg7G83k4yVSoZ97ChO88vK5GMnthTVY5zd0qyih6qBW39zM +J5YSkq2cRdoLxs4Af8aG+/+nZJwGO5OCweoM1adeVpWWaTOk7YX6pdcaCtyhmBG59XLnYknz5mbr PtQs+nWA==; Received: from [2001:4bb8:18c:5da7:8164:affc:3c20:853d] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jdoYq-000141-Dn; Wed, 27 May 2020 05:25:04 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Konstantin Khlebnikov , Minchan Kim , Nitin Gupta , dm-devel@redhat.com, linux-block@vger.kernel.org, drbd-dev@lists.linbit.com, linux-bcache@vger.kernel.org, linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org Subject: [PATCH 15/16] block: use __this_cpu_add() instead of access by smp_processor_id() Date: Wed, 27 May 2020 07:24:18 +0200 Message-Id: <20200527052419.403583-16-hch@lst.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200527052419.403583-1-hch@lst.de> References: <20200527052419.403583-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Konstantin Khlebnikov Most architectures have fast path to access percpu for current cpu. The required preempt_disable() is provided by part_stat_lock(). Signed-off-by: Konstantin Khlebnikov [hch: rebased] Signed-off-by: Christoph Hellwig --- include/linux/part_stat.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/part_stat.h b/include/linux/part_stat.h index a6b0938ce82e9..24125778ef3ec 100644 --- a/include/linux/part_stat.h +++ b/include/linux/part_stat.h @@ -54,7 +54,7 @@ static inline void part_stat_set_all(struct hd_struct *part, int value) part_stat_read(part, field[STAT_DISCARD])) #define __part_stat_add(part, field, addnd) \ - (part_stat_get(part, field) += (addnd)) + __this_cpu_add((part)->dkstats->field, addnd) #define part_stat_add(part, field, addnd) do { \ __part_stat_add((part), field, addnd); \