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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1C627C4167B for ; Mon, 11 Dec 2023 13:57:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343695AbjLKN44 (ORCPT ); Mon, 11 Dec 2023 08:56:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60430 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343819AbjLKNyO (ORCPT ); Mon, 11 Dec 2023 08:54:14 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CC43C211E for ; Mon, 11 Dec 2023 05:53:16 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 778F4C433D9; Mon, 11 Dec 2023 13:53:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1702302796; bh=1FGXzOaZOzxS1ldc+LzGNkdq2ud1cBYt+XVVjU4funE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pRCc1b2WPQgue2UgbIoR8NQ6YnRdj/VliRRRNP8S/xFAyVG1PEqO84kTrgzov3IAc 9dVFLIouJ2GkAUVoD0sB/AGfh/yClZ5Z9xK9evDdpZgwibFcNRnbV69k1kIQ2FQrog uxcmYCxZMGVF0dMhMUQDuorGxeyjXjP3fFVEO1xbrMUTwujvLQkrjGdVv6JruXp4Vj Bfg4VJDk6fD2OfC8UZi2ZGfzwGAIaHgZvlepFfBgNeLsY+MGJKc2U6FzX2bbjeGRYa 2TkOfTYk1Rr8H+GLsVBsTf6JObBh3/+FrJMX285iXT+fPd9jntPIgPFbk1bUrzPHuU IS9thvHb7/8GA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Keith Busch , Sagi Grimberg , Sasha Levin , linux-nvme@lists.infradead.org Subject: [PATCH AUTOSEL 6.6 30/47] nvme: introduce helper function to get ctrl state Date: Mon, 11 Dec 2023 08:50:31 -0500 Message-ID: <20231211135147.380223-30-sashal@kernel.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231211135147.380223-1-sashal@kernel.org> References: <20231211135147.380223-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.6.5 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Keith Busch [ Upstream commit 5c687c287c46fadb14644091823298875a5216aa ] The controller state is typically written by another CPU, so reading it should ensure no optimizations are taken. This is a repeated pattern in the driver, so start with adding a convenience function that returns the controller state with READ_ONCE(). Reviewed-by: Sagi Grimberg Signed-off-by: Keith Busch Signed-off-by: Sasha Levin --- drivers/nvme/host/nvme.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index f35647c470afa..68313148e6ed5 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -386,6 +386,11 @@ struct nvme_ctrl { enum nvme_dctype dctype; }; +static inline enum nvme_ctrl_state nvme_ctrl_state(struct nvme_ctrl *ctrl) +{ + return READ_ONCE(ctrl->state); +} + enum nvme_iopolicy { NVME_IOPOLICY_NUMA, NVME_IOPOLICY_RR, -- 2.42.0