From nobody Fri May 17 04:49:40 2024 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 47EA2C433F5 for ; Mon, 18 Apr 2022 06:19:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236738AbiDRGWM (ORCPT ); Mon, 18 Apr 2022 02:22:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33124 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235688AbiDRGWL (ORCPT ); Mon, 18 Apr 2022 02:22:11 -0400 Received: from mail-wm1-x32a.google.com (mail-wm1-x32a.google.com [IPv6:2a00:1450:4864:20::32a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4BAEA17E23 for ; Sun, 17 Apr 2022 23:19:32 -0700 (PDT) Received: by mail-wm1-x32a.google.com with SMTP id c190-20020a1c35c7000000b0038e37907b5bso11244233wma.0 for ; Sun, 17 Apr 2022 23:19:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=TpWXWlsIiwFWqITQBBmHqt+ptX9YU3vyMz2FKFbBljI=; b=KVf+4C/PtpEfuB/Nxd/EYlIv9rV9YIYR3O2bMQguZFWKge/IUlTq8vQWAZQe8oiaVp tSbS/pFY1PvpYzcU3FT9E8BRiWtfFu5LHlsOjEmoAi7ACi+Iy1ESCvvP4miqPbcT8X8j fFiFpDshwNnmiXZ11QLg/k9C528xaqqbPLvtDAIxe/C2/xIV1DalMdAup68C2N13YvlV +Euy8Huqd/3jlzskYYaJTeN7QjGP7T0lPwSx0WQmyKkF0TicIgSgJVnDmChDfq/cmVJu wBFN3wCYNC2QFtJ8ZvakpGXI6GS2j/tdOF/sDc/nVPvMpu2Xh1aU376/LhlyUkX967ky Psrw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=TpWXWlsIiwFWqITQBBmHqt+ptX9YU3vyMz2FKFbBljI=; b=aRe2aPeuB+s6Kr/4RXC3PhcKhC/B2TmaRqGOdLTW3Wy6ewJwnoUbWvH63+NFWYAWTY O3Rj5aqCQ7IVSaYm5ZMmgVuIMvDqcsyQS59AFYr0docDBui3wGAiRnFmSxMh/3pWf35L Kfqr7NBgt0U487EwkITqKVTz95pPZbyJV9IDD57YzDZ9SQ2RwwIg/TmqDvmtoBt+OIw3 AR5uW98GfW8flvidAgt8MSx7QBpm0n4Nq3RYnnDtv93byctJCp4LWPkMUXZqwNsDISxn TxgX/pBoFgupnYe1VVRK3OfjFTX+XO9d06Rpe5K9jWFMJE8ta1NsdbxcxbcQ7qZs6NQv QGrA== X-Gm-Message-State: AOAM532p7Xe+36h9RySuFhyow/mMbiExLfF9JEeORQJ8Oddb6Iw8FTAq FfaqS0cZ32VAP+q+UQUNFKA= X-Google-Smtp-Source: ABdhPJyZ1HNParLvvy4rzpznCl7QS81uDSoiwV8fB4OIS0XVE5dQ8FZK+15fz5DY06IYoRqXJpCRHw== X-Received: by 2002:a05:600c:4f87:b0:392:9236:3c73 with SMTP id n7-20020a05600c4f8700b0039292363c73mr5367903wmq.158.1650262770786; Sun, 17 Apr 2022 23:19:30 -0700 (PDT) Received: from alaa-emad ([197.57.90.163]) by smtp.gmail.com with ESMTPSA id q16-20020a1ce910000000b0038eabd31749sm13992199wmc.32.2022.04.17.23.19.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 17 Apr 2022 23:19:30 -0700 (PDT) From: Alaa Mohamed To: outreachy@lists.linux.dev Cc: boris.ostrovsky@oracle.com, jgross@suse.com, sstabellini@kernel.org, xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, ira.weiny@intel.com, eng.alaamohamedsoliman.am@gmail.com Subject: [PATCH] xen: gntalloc.c: Convert kmap() to kmap_local_page() Date: Mon, 18 Apr 2022 08:19:27 +0200 Message-Id: <20220418061927.6833-1-eng.alaamohamedsoliman.am@gmail.com> X-Mailer: git-send-email 2.35.2 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The use of kmap() is being deprecated in favor of kmap_local_page() where it is feasible. With kmap_local_page(), the mapping is per thread, CPU local and not globally visible. Therefore __del_gref() is a function where the use of kmap_local_page() in place of kmap() is correctly suited. Signed-off-by: Alaa Mohamed Reviewed-by: Juergen Gross --- drivers/xen/gntalloc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/xen/gntalloc.c b/drivers/xen/gntalloc.c index 4849f94372a4..55acb32842a3 100644 --- a/drivers/xen/gntalloc.c +++ b/drivers/xen/gntalloc.c @@ -178,9 +178,9 @@ static void __del_gref(struct gntalloc_gref *gref) unsigned long addr; =20 if (gref->notify.flags & UNMAP_NOTIFY_CLEAR_BYTE) { - uint8_t *tmp =3D kmap(gref->page); + uint8_t *tmp =3D kmap_local_page(gref->page); tmp[gref->notify.pgoff] =3D 0; - kunmap(gref->page); + kunmap_local(tmp); } if (gref->notify.flags & UNMAP_NOTIFY_SEND_EVENT) { notify_remote_via_evtchn(gref->notify.event); --=20 2.35.2