Received: by 2002:a05:6a10:8c0a:0:0:0:0 with SMTP id go10csp2881488pxb; Tue, 9 Mar 2021 13:26:32 -0800 (PST) X-Google-Smtp-Source: ABdhPJwEwznpdwU7af+WdmqV7W2jAafZq7jbH6HQB0SUQ7VB/D4fUcmEV2lPHZv1yhUE20CVQfw9 X-Received: by 2002:a17:907:1b06:: with SMTP id mp6mr72920ejc.408.1615325192050; Tue, 09 Mar 2021 13:26:32 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1615325192; cv=none; d=google.com; s=arc-20160816; b=uExAdupEkaOK8oXfYKMxlFZLBcRpD8uhdBF9NnD8xBLRe1B/MEB2uB3N2EsLYyavVO taesiVXyhNd3gbZeNQCtrJGo4Y6L4L7FL5iHFyjtU8rF0f1yaJyXp821wDjyJ7Qh7d+h 6zuhZZ/rXEs7SoJnQOY2cQZbj0txA2tleJiMGoN838aHFgDEUU9lCUU2Vu0FQMlkwKVK y2mvuy5Sb/JeuEy+XX/jufO3N3vvR78iEhdOOtG1GsyWBFYuQu/vPZFUnXFn9HXQupP0 4NzqmOrIMPDlmB3vK2F/+i5FRgIxFmiK1Gz7mFv08Jr/alqb7PXY8TF9YMPYHGGuJCMk R3YA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :ironport-sdr:ironport-sdr; bh=9rLHQPI3C+Qe2zN24TjbWaKnSMySzeejUrRRfJxeJZE=; b=aX+a0z4D9HSK/LUz3hQKyETxJUww5sDT124CO6MrIi8UmJae0EN/0iwl5kkOBH2YPt mxuzPH0KGamrjknu4FHrGYwgUPFbOcnfLsYoqLWCBnCizkls9DDsWHdn6X5x6VSeJuxB OOsOFMUrSYhEQfEmVKKRGEMxAYtOIxOVbP5AS3hKmCBBi37m8kETRfkbI6TLgICDxrfY 8kue8PdUsiz8zsNQcKQ0vp7ENIag3kQJ0PN6VmGiQzDpBnLasY1hIyO72G7mtRH9VAkw YMWyXFHTA4KdwjKehiX0tpxJ0A9oZejzf1reKFYwJklayV4V8TJzBxxosVTpvuOW/iNB InXw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id pk25si10444069ejb.402.2021.03.09.13.26.09; Tue, 09 Mar 2021 13:26:32 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231998AbhCIVWW (ORCPT + 99 others); Tue, 9 Mar 2021 16:22:22 -0500 Received: from mga06.intel.com ([134.134.136.31]:60761 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230266AbhCIVVw (ORCPT ); Tue, 9 Mar 2021 16:21:52 -0500 IronPort-SDR: kb2KjBP6Zlhv/wu7311KlRETGLSymZFVw6L/lLQIMkwIa4ZHAVfZvr/frK7Kj+hwirUa5ciYwF XCLDh1cmnSZg== X-IronPort-AV: E=McAfee;i="6000,8403,9917"; a="249698113" X-IronPort-AV: E=Sophos;i="5.81,236,1610438400"; d="scan'208";a="249698113" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Mar 2021 13:21:50 -0800 IronPort-SDR: DZHac8nRvPxZ4s8fABJrstCU7clqI57Eh+j7MKulxeGFSlLyq0h7Am51PRgQTPeESnFm99kgGQ 0aukMtcCbysA== X-IronPort-AV: E=Sophos;i="5.81,236,1610438400"; d="scan'208";a="509424712" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Mar 2021 13:21:50 -0800 From: ira.weiny@intel.com To: Andrew Morton Cc: Ira Weiny , Chaitanya Kulkarni , David Sterba , Chris Mason , Josef Bacik , linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/3] mm/highmem: Convert memzero_page() to kmap_local_page() Date: Tue, 9 Mar 2021 13:21:36 -0800 Message-Id: <20210309212137.2610186-3-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20210309212137.2610186-1-ira.weiny@intel.com> References: <20210309212137.2610186-1-ira.weiny@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ira Weiny The memset() does not need to be performed atomically. Use kmap_local_page() which will improved performance for this call. Cc: Chaitanya Kulkarni Cc: David Sterba Signed-off-by: Ira Weiny --- include/linux/highmem.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/highmem.h b/include/linux/highmem.h index 832b49b50c7b..0dc0451cf1d1 100644 --- a/include/linux/highmem.h +++ b/include/linux/highmem.h @@ -334,9 +334,9 @@ static inline void memcpy_to_page(struct page *page, size_t offset, static inline void memzero_page(struct page *page, size_t offset, size_t len) { - char *addr = kmap_atomic(page); + char *addr = kmap_local_page(page); memset(addr + offset, 0, len); - kunmap_atomic(addr); + kunmap_local(addr); } #endif /* _LINUX_HIGHMEM_H */ -- 2.28.0.rc0.12.gb6a658bd00c9