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 00DE1C10DC3 for ; Mon, 11 Dec 2023 14:08:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344169AbjLKOIh (ORCPT ); Mon, 11 Dec 2023 09:08:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54820 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344137AbjLKOIO (ORCPT ); Mon, 11 Dec 2023 09:08:14 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 81D5C30DC for ; Mon, 11 Dec 2023 05:56:07 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 702A3C43391; Mon, 11 Dec 2023 13:56:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1702302967; bh=7FWLRc1p6rU6lBfjPN3MpBMeNXSUTIig4nLI3YeSsPM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HMDtTmrZdRo54xdeGELIEYyXlyCPWGvTXl6Vl320flODlruS9ce+NtOYct/wAWxOj WdUieECt9yZV+82SRFBDsIBvL0fe5WSxIkxxAYMklpI5pe/otBR8Ld+FCtKOvcFkri j+pY9F+1C7lqU0YDsWolZPt8iUFlWinPKdfhfbUZ1D9lmqug7Dm34QBeV1sJtfW3oG MSaDRHlVVtRkkTdOjRK2CL/cmfWawbUdVmTyBuWhCPyLHipCEo4HOkVsK1ggHmewbC cyIXDfaTkhk6GPOgfDnV5ZtLXdwKp0be2tv2wRKV30R8VpQKHGRaYfsFkQ62lsAi2f W2YMJ12yAmvSA== 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 6.1 19/29] nvme: introduce helper function to get ctrl state Date: Mon, 11 Dec 2023 08:54:03 -0500 Message-ID: <20231211135457.381397-19-sashal@kernel.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231211135457.381397-1-sashal@kernel.org> References: <20231211135457.381397-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.1.66 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 69f9e69208f68..8b50b56b8ee31 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -377,6 +377,11 @@ 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