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 X-Spam-Level: X-Spam-Status: No, score=-8.3 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_IN_DEF_DKIM_WL autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 52C0FC432C0 for ; Thu, 21 Nov 2019 12:02:06 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 13A6120872 for ; Thu, 21 Nov 2019 12:02:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="u/txj8Fc" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 13A6120872 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 9C2186B030D; Thu, 21 Nov 2019 07:02:05 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 9719A6B030E; Thu, 21 Nov 2019 07:02:05 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 860AF6B030F; Thu, 21 Nov 2019 07:02:05 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0195.hostedemail.com [216.40.44.195]) by kanga.kvack.org (Postfix) with ESMTP id 6E53F6B030D for ; Thu, 21 Nov 2019 07:02:05 -0500 (EST) Received: from smtpin23.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with SMTP id 2CC665DC8 for ; Thu, 21 Nov 2019 12:02:05 +0000 (UTC) X-FDA: 76180146210.23.view78_696c421522007 X-HE-Tag: view78_696c421522007 X-Filterd-Recvd-Size: 5105 Received: from mail-wm1-f67.google.com (mail-wm1-f67.google.com [209.85.128.67]) by imf41.hostedemail.com (Postfix) with ESMTP for ; Thu, 21 Nov 2019 12:02:04 +0000 (UTC) Received: by mail-wm1-f67.google.com with SMTP id l1so3419705wme.2 for ; Thu, 21 Nov 2019 04:02:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=pdhKVAlLWnK5RXKE7u+QapODy+S9GmmwlJOm36ySxkI=; b=u/txj8FcjieoQ4DQ255G0O54kK7bUyf1YZsTrwaSS0QwL6GEKXFBZkU3RGthxdJosd mIaXifzYfBDvLOb5I4d/WMUNztiH985keCM/0kFDGjOYY2+qxWmiQ1emYXPsMBJ8hq7Y GktCshaYs1ot9JuGxbeQYGM95XFmsmG6Tuvd5CPq0wG9z8DAnauBwqXUV2i7A1FCrN1i +WrDA2urzuniirGQVmuAAQeLMwjqGfdoOZPEH+58aMHgpKx3kwgvkgnxOQn1+Aol8f6I z7Q+jq1/jvQC3THAzj+N94sYv1woX71mtxCvuBQoFlH6dYb2tghAzW2RBZ4mccrbxyek WhPQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=pdhKVAlLWnK5RXKE7u+QapODy+S9GmmwlJOm36ySxkI=; b=TQZmzMijzUfKLx31PXawVEiYCN5YD7ey0oqgaW0SA0XyMfRo5/1YrCm8gQDqcSf/JC v4kfgvk3K2VyBDB62d6J7IUjdvvQIrxe60GNpsUx/eUghAgpK5ag8eLu3iz1BIqG4Cub lbbqKWFNvVWudytFWvPP54oEtC0UfCWU1aFAXNrIuu/B8CORwyJjccNZlNrMPpgQdUpy O05VTN0HSPE8mhU+FvhUG3DC4P9uzoGGtVxrNA8A9mjUizPoodcbwuQGnQne/1rrLjhl VnfKSQDLHFuiyzfV632pc9j2W2az3lQVGxsQAmIuJRYyfrsuxEEL6wkS5Y2hcIrr6+Np BLzQ== X-Gm-Message-State: APjAAAVg/Nbrh0jNRquLJs0IiflZgMzcjA1zCjzo4w6FSV7oBQ/bAT5g 0eLLolZHstr+5PE7bFpEW1MOdYOMQgDaeRkWoga9Og== X-Google-Smtp-Source: APXvYqy94JsKUSZBslfXRyDhZJjgUqOh2VkQLv++vvsPccdbrAnO9eMyXmV3bKZmciZpE0rTdWBkeGso//OVrgt1Z/w= X-Received: by 2002:a1c:7d16:: with SMTP id y22mr9222879wmc.106.1574337722632; Thu, 21 Nov 2019 04:02:02 -0800 (PST) MIME-Version: 1.0 References: <20191030142237.249532-1-glider@google.com> <20191030142237.249532-10-glider@google.com> <20191113081346.GA1520@kunai> In-Reply-To: <20191113081346.GA1520@kunai> From: Alexander Potapenko Date: Thu, 21 Nov 2019 13:01:51 +0100 Message-ID: Subject: Re: [PATCH RFC v2 09/25] kmsan: add KMSAN runtime To: Wolfram Sang Cc: Vegard Nossum , Dmitry Vyukov , Linux Memory Management List , Al Viro , Andrew Morton , Andrey Ryabinin , Andy Lutomirski , Ard Biesheuvel , Arnd Bergmann , Christoph Hellwig , Dmitry Torokhov , Eric Dumazet , Eric Van Hensbergen , Greg Kroah-Hartman , Harry Wentland , Herbert Xu , Ingo Molnar , Jens Axboe , "Martin K . Petersen" , Martin Schwidefsky , "Michael S. Tsirkin" , Michal Simek , Petr Mladek , Sergey Senozhatsky , Steven Rostedt , Takashi Iwai , "Theodore Ts'o" , Thomas Gleixner , Vasily Gorbik , Ilya Leoshkevich , Mark Rutland , Matthew Wilcox , Randy Dunlap , Andrey Konovalov , Marco Elver Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Nov 13, 2019 at 9:13 AM Wolfram Sang wrote: > > Hi, > > > +/* Helper function to check I2C-transferred data. */ > > I assume I2C is just one of the first users and other users like SPI > will be implemented as time passes? Otherwise I would wonder why I2C > needs to be handled with this special function. Initially this was just because I2C errors kept firing in the default build= . v3 adds DMA support to KMSAN, so I think we don't need to specially handle = i2c. > > +void kmsan_handle_i2c_transfer(struct i2c_msg *msgs, int num) > > +{ > > + int i; > > + > > + if (!msgs) > > + return; > > Can go. You call this function from __i2c_transfer and this checks for > valid 'msgs'. > > Kind regards, > > Wolfram > --=20 Alexander Potapenko Software Engineer Google Germany GmbH Erika-Mann-Stra=C3=9Fe, 33 80636 M=C3=BCnchen Gesch=C3=A4ftsf=C3=BChrer: Paul Manicle, Halimah DeLaine Prado Registergericht und -nummer: Hamburg, HRB 86891 Sitz der Gesellschaft: Hamburg