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 91018C433EF for ; Mon, 25 Apr 2022 17:58:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244165AbiDYSBI (ORCPT ); Mon, 25 Apr 2022 14:01:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58980 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244144AbiDYSBF (ORCPT ); Mon, 25 Apr 2022 14:01:05 -0400 Received: from mail-ed1-x52c.google.com (mail-ed1-x52c.google.com [IPv6:2a00:1450:4864:20::52c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0D35443EF9 for ; Mon, 25 Apr 2022 10:58:00 -0700 (PDT) Received: by mail-ed1-x52c.google.com with SMTP id z19so6134117edx.9 for ; Mon, 25 Apr 2022 10:57:59 -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=N6noJ6tvaokO4u8mHwJ9w/N757Ijrb2vwZu2W/LD+HA=; b=P7up2SYkbQdWH0attZX80NBKHV1I8wXsL/5Q6VvZaG5up02+7EiHNR9P/VRUyzP+/p ZzDetWi6htFL814czHR1K8VdEgaFTIStQjmSDBFJXQe7FMajvalkbjjxXifne/AEgnBd PgYNZmLvcD7Xskor8i7vBg4HfpOUtVQqCxvDYz08VR323XpnpYluBxHzskQzSY2UonWP jcdgGWTGqfq2p+Us3Oue5m9ScpYq6EKa9ngEBaprEDCaHUzk1GmFO4SFLITUEe6HTFA/ NvmFJaxgod4WbPMGYrn04L3qY9rsJ+31QIKhFF96DsoGN8LbS9tilSaGWDPh6gXacTeD O24A== 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=N6noJ6tvaokO4u8mHwJ9w/N757Ijrb2vwZu2W/LD+HA=; b=moLKReTihWCo0DVgIEkd70z+xFeszBCUjtfHrm1ZqXOJmsAWRyROPr+iLKKS6IHf7L hvr2xg8+sCKaMNh7q0NbHVkgIfBLxZZ4Kd3n8O5GcctoBOU/WTKW/xKzEIU5DtJ7du/t NZc/hbGzejVyVsKbx92EJ5/+ITmR4lN5NbG03UFGwUSMUELAnE368Sg8bILsPHfdQpLO 3axnq2t42K4hn5UMo4aDcRJNLN7axtvmOYoB1CLLAHd7YWvf5cikg5lr372QsVvtcb4t +XFY1WAfV6tFukDeJOTHWfgGXCEu8ogz8Z9vxjNClVGcByfMrV064li2eJLM6h/BgAjE m9xw== X-Gm-Message-State: AOAM5312uo7dRpkfbpBEd/d+mKsNydQfmSK4AQrt1YFVDgIkjMATjapH Y0BaSx39MbaQVfYfkCjw8do= X-Google-Smtp-Source: ABdhPJzHtThWpw/7SNHkVA3b3CKT6+k7h7GY8DhlUIUrBaSFzmKGetmCP5AQYIPS+8BGGdzo1lILsQ== X-Received: by 2002:a05:6402:2291:b0:425:deb5:73be with SMTP id cw17-20020a056402229100b00425deb573bemr9147572edb.392.1650909478450; Mon, 25 Apr 2022 10:57:58 -0700 (PDT) Received: from localhost.localdomain (host-79-50-86-254.retail.telecomitalia.it. [79.50.86.254]) by smtp.gmail.com with ESMTPSA id ia5-20020a170907a06500b006f392df973bsm1497207ejc.107.2022.04.25.10.57.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Apr 2022 10:57:57 -0700 (PDT) From: "Fabio M. De Francesco" To: Greg Kroah-Hartman , =?UTF-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= , Todd Kjos , Martijn Coenen , Joel Fernandes , Christian Brauner , Hridya Valsaraju , Suren Baghdasaryan , Ira Weiny , linux-kernel@vger.kernel.org, Christophe JAILLET Cc: "Fabio M. De Francesco" Subject: [PATCH v2 0/3] binder: Use kmap_local_page() in binder_alloc.c Date: Mon, 25 Apr 2022 19:57:51 +0200 Message-Id: <20220425175754.8180-1-fmdefrancesco@gmail.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use kmap_local_page() in binder_alloc.c because kmap() and kmap_atomic() are being deprecated and kmap_local_page() is preferred where it is feasible. With kmap_local_page(), the mapping is per thread, CPU local and not globally visible. Furthermore, the mapping can be acquired from any context, including interrupts. Fabio M. De Francesco (3): binder: Use memset_page() in binder_alloc_clear_buf() binder: Use kmap_local_page() in binder_alloc_copy_user_to_buffer() binder: Use memcpy_{to,from}_page() in binder_alloc_do_buffer_copy() drivers/android/binder_alloc.c | 22 +++++----------------- 1 file changed, 5 insertions(+), 17 deletions(-) -- 2.34.1