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[198.145.29.99]) by mx.google.com with ESMTPS id y7si73672pgj.252.2019.06.06.13.26.47 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 06 Jun 2019 13:26:47 -0700 (PDT) Received-SPF: pass (google.com: domain of luto@kernel.org designates 198.145.29.99 as permitted sender) client-ip=198.145.29.99; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=sQw0Lu9C; spf=pass (google.com: domain of luto@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=luto@kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from mail-wm1-f51.google.com (mail-wm1-f51.google.com [209.85.128.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D86DD215EA for ; Thu, 6 Jun 2019 20:26:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559852807; bh=KPzI+YwSmOs28yM0mu03w5J/5AGDUhBeJx6OEeWoVX4=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=sQw0Lu9CAjfPFLxj0f4izZgbct9wON3UkoluMWtqqvnVZi7LX6+PqbRKcUNtGFPRC VwSx/IwIvxNRl/Eh2ce4stDlwhsMthuxOUrJ/gpf6YOh6guy7TBeQP/aoPkMh3L+/v d2/JTlzLlzvCzvUELTMuYV1T3nAUPyJwHIqwc0MM= Received: by mail-wm1-f51.google.com with SMTP id z23so1213468wma.4 for ; Thu, 06 Jun 2019 13:26:46 -0700 (PDT) X-Received: by 2002:a1c:6242:: with SMTP id w63mr1265538wmb.161.1559852805470; Thu, 06 Jun 2019 13:26:45 -0700 (PDT) MIME-Version: 1.0 References: <20190606200926.4029-1-yu-cheng.yu@intel.com> <20190606200926.4029-10-yu-cheng.yu@intel.com> In-Reply-To: <20190606200926.4029-10-yu-cheng.yu@intel.com> From: Andy Lutomirski Date: Thu, 6 Jun 2019 13:26:34 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v7 09/14] x86/vdso: Insert endbr32/endbr64 to vDSO To: Yu-cheng Yu Cc: X86 ML , "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , LKML , "open list:DOCUMENTATION" , Linux-MM , linux-arch , Linux API , Arnd Bergmann , Balbir Singh , Borislav Petkov , Cyrill Gorcunov , Dave Hansen , Eugene Syromiatnikov , Florian Weimer , "H.J. Lu" , Jann Horn , Jonathan Corbet , Kees Cook , Mike Kravetz , Nadav Amit , Oleg Nesterov , Pavel Machek , Peter Zijlstra , Randy Dunlap , "Ravi V. Shankar" , Vedvyas Shanbhogue , Dave Martin Content-Type: text/plain; charset="UTF-8" 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 Thu, Jun 6, 2019 at 1:17 PM Yu-cheng Yu wrote: > > From: "H.J. Lu" > > When Intel indirect branch tracking is enabled, functions in vDSO which > may be called indirectly must have endbr32 or endbr64 as the first > instruction. Compiler must support -fcf-protection=branch so that it > can be used to compile vDSO. Acked-by: Andy Lutomirski > > Signed-off-by: H.J. Lu You're still missing your Signed-off-by.