From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dave Martin <Dave.Martin@arm.com>
Subject: [PATCH v5 23/30] arm64/sve: Add sysctl to set the default vector
 length for new processes
Date: Tue, 31 Oct 2017 15:51:15 +0000
Message-ID: <1509465082-30427-24-git-send-email-Dave.Martin@arm.com>
References: <1509465082-30427-1-git-send-email-Dave.Martin@arm.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <kvmarm-bounces@lists.cs.columbia.edu>
Received: from localhost (localhost [127.0.0.1])
 by mm01.cs.columbia.edu (Postfix) with ESMTP id 3B97649D4F
 for <kvmarm@lists.cs.columbia.edu>; Tue, 31 Oct 2017 11:50:43 -0400 (EDT)
Received: from mm01.cs.columbia.edu ([127.0.0.1])
 by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024)
 with ESMTP id rjeQAQhO5ftx for <kvmarm@lists.cs.columbia.edu>;
 Tue, 31 Oct 2017 11:50:42 -0400 (EDT)
Received: from foss.arm.com (foss.arm.com [217.140.101.70])
 by mm01.cs.columbia.edu (Postfix) with ESMTP id 2D1F449D60
 for <kvmarm@lists.cs.columbia.edu>; Tue, 31 Oct 2017 11:50:40 -0400 (EDT)
In-Reply-To: <1509465082-30427-1-git-send-email-Dave.Martin@arm.com>
List-Unsubscribe: <https://lists.cs.columbia.edu/mailman/options/kvmarm>,
 <mailto:kvmarm-request@lists.cs.columbia.edu?subject=unsubscribe>
List-Archive: <https://lists.cs.columbia.edu/pipermail/kvmarm>
List-Post: <mailto:kvmarm@lists.cs.columbia.edu>
List-Help: <mailto:kvmarm-request@lists.cs.columbia.edu?subject=help>
List-Subscribe: <https://lists.cs.columbia.edu/mailman/listinfo/kvmarm>,
 <mailto:kvmarm-request@lists.cs.columbia.edu?subject=subscribe>
Errors-To: kvmarm-bounces@lists.cs.columbia.edu
Sender: kvmarm-bounces@lists.cs.columbia.edu
To: linux-arm-kernel@lists.infradead.org
Cc: linux-arch@vger.kernel.org, Okamoto Takayuki <tokamoto@jp.fujitsu.com>, libc-alpha@sourceware.org, Ard Biesheuvel <ard.biesheuvel@linaro.org>, Szabolcs Nagy <szabolcs.nagy@arm.com>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com>, kvmarm@lists.cs.columbia.edu
List-Id: kvmarm@lists.cs.columbia.edu
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