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[209.132.180.67]) by mx.google.com with ESMTP id d8si1237878oti.306.2020.02.06.23.23.42; Thu, 06 Feb 2020 23:23:54 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=AaAL+l83; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727011AbgBGHWr (ORCPT + 99 others); Fri, 7 Feb 2020 02:22:47 -0500 Received: from mail-pg1-f193.google.com ([209.85.215.193]:33030 "EHLO mail-pg1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726130AbgBGHWr (ORCPT ); Fri, 7 Feb 2020 02:22:47 -0500 Received: by mail-pg1-f193.google.com with SMTP id 6so677074pgk.0; Thu, 06 Feb 2020 23:22:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=3nmzbdbheHnMaWDPCmLrpqSuNwo33dHsSoSoy5YyYwM=; b=AaAL+l83QI85UuIoZ1kC5flbtXie45z5c0MXrQ5smNfuNNTIMXlpJBEP0B7hnma/rw lFwwB47Wd5lplteiQ6D72pOU+foZzRh1fBucRMGAYJzU8SvR/57bTvVqVrXZgvKtqmJh hDMU9hlvwbbsm7gMJGMDQjFJIxcUkyCjbgYM5dcQc1DcOi7z5pU1kPVGHBF4VWiTjiLq 2ra6bqtMQFgnDkXQGC+7AS+mdp3UWhugldc9AHkQQH8ltddrievQAE1GzdOM3uWQb1n7 3c1XCKcsad4owQlh2dsboaE+vU2pF3ddZr6ZM2K06B/QyjWfLSsu7RBBbWtN9F9jrBCo 9Lew== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=3nmzbdbheHnMaWDPCmLrpqSuNwo33dHsSoSoy5YyYwM=; b=kUZSXJbRm7aghplogySWLDHmzseXuktwTRaFfDxQ+YVlr0bv2VUafRtXT24g7tp2ii afy4Stud7m4X1l5omhiyeDfLpWzafcmMMikylBVmc/LapIfuGJtLt25QbIVZsGngLo4z 6u1xFqQF6S/lqMoYvunMr1VJ6dfyiQ/aIjjZzGF8KA0MwwAHVQxPIrkG+B2XLGxsU4Gp /naEuwECMXhCOTp2sePNK6uhUjcWtm0jacLjSOJZzji0pliW7yW+HNVbB9XhN+TWeAgV 2tHAevxkQAFd1X3o6T8uG08Q8AVVaUpcyhANmfyCRe7u1qYCv1prbqOhzOItuFdZyTjF RfnQ== X-Gm-Message-State: APjAAAV1dyBtYUTh4IZu4S7YzAsf3nxtKamhFzoFvVG7e5Gp/d2dcKYK ynXM7+e5sUQoD5oas60koiU= X-Received: by 2002:aa7:8191:: with SMTP id g17mr8691972pfi.25.1581060166212; Thu, 06 Feb 2020 23:22:46 -0800 (PST) Received: from localhost.localdomain ([2408:821a:3c17:470:6d92:2bc5:fbc9:5826]) by smtp.gmail.com with ESMTPSA id g72sm1760633pfb.11.2020.02.06.23.22.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Feb 2020 23:22:45 -0800 (PST) From: youling257 To: arnd@arndb.de Cc: axboe@kernel.dk, jejb@linux.ibm.com, martin.petersen@oracle.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, youling257 Subject: Re: [PATCH v2 20/27] compat_ioctl: simplify the implementation Date: Fri, 7 Feb 2020 15:22:10 +0800 Message-Id: <20200207072210.10134-1-youling257@gmail.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20191217221708.3730997-21-arnd@arndb.de> References: <20191217221708.3730997-21-arnd@arndb.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch cause a problem on 64bit kernel 32bit userspace. My 32bit Androidx86 userspace run on 64bit mainline kernel, this patch caused some app not detect root permission.