From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AIpwx48QddjmdWUUfznhcPBAcbN61Cvro/PL8HV9xUYRWthkFaO8V8x5+VfkstTExgisrOGZre1D ARC-Seal: i=1; a=rsa-sha256; t=1523350764; cv=none; d=google.com; s=arc-20160816; b=CzUdE0B6Lk3wgWBmq+5YuUN5BcOHjds/9C0dhv16XyOFRsncw/jjQ7pMm9JHPjrVxn s0QTyHGpvu7XUss2toc8Tfwur8cZSFsVvdvkmxGjCJ5SoUliiX7WahYquKuGAoX8WZvf 8xPbPnCG4yMBDSsjKcZc6ed0oSRNWsJpb7R71Kbi6h76sw1lOsON4K4igVElD0a9ecr3 IynZxZ3Hu4uVD/0vzQuWllviwMFf2ppTtkivMF765VZ2gtMQ/Pl+e6qwYudvGWEAjzrV Tdp6kqjzHMq/WyNAswE1O+Uq6N4qg6Zt309Dyvg3qpUv4tWsLmTz59SKnGP0IwmFrDe9 2pUg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:content-language:in-reply-to:mime-version :user-agent:date:message-id:from:references:cc:to:subject :dmarc-filter:dkim-signature:dkim-signature:delivered-to :delivered-to:list-id:list-subscribe:list-unsubscribe:list-help :list-post:precedence:mailing-list:arc-authentication-results; bh=gEgzNzCjMDXeEVFZGAmtmmP8nbzjoMD1Urh9c9PtS94=; b=XJ+PnbGcqoSD2Ab91JA2HOlnue+r+3h2V9c51iuNZaLtTTJd2p2EJHGERVWiABRQWA nI2tPcpOIYrf+BmFVL2MBHZxlgl4G9QfEMNLMI8TIlbQxR306gIyb0K1iw4xu6Qtz1kl a+hXhklEpLMV9eH13vJmcJh50wVf7chAAspNwKmd7ILY6ilIIEaOitd1IdPdY4yadlZl BPd6U4g/9oiLiEcsM9jmRHCCeYhe/+eoTeyFanPxUmbJAzxXecoWtJ3eTfNt85AeXsEj 9Ugf6tOwJgR8JYQT4W4DQ+16n3zsBt29dh1fPzQcEaCRCyRcdzRiPonbBuB0aLUZmKcn Oi2g== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@codeaurora.org header.s=default header.b=GbH8jBjt; dkim=pass header.i=@codeaurora.org header.s=default header.b=B40lk+un; spf=pass (google.com: domain of kernel-hardening-return-12953-gregkh=linuxfoundation.org@lists.openwall.com designates 195.42.179.200 as permitted sender) smtp.mailfrom=kernel-hardening-return-12953-gregkh=linuxfoundation.org@lists.openwall.com Authentication-Results: mx.google.com; dkim=pass header.i=@codeaurora.org header.s=default header.b=GbH8jBjt; dkim=pass header.i=@codeaurora.org header.s=default header.b=B40lk+un; spf=pass (google.com: domain of kernel-hardening-return-12953-gregkh=linuxfoundation.org@lists.openwall.com designates 195.42.179.200 as permitted sender) smtp.mailfrom=kernel-hardening-return-12953-gregkh=linuxfoundation.org@lists.openwall.com Mailing-List: contact kernel-hardening-help@lists.openwall.com; run by ezmlm List-Post: List-Help: List-Unsubscribe: List-Subscribe: DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 32B2360AFB Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=okaya@codeaurora.org Subject: Re: [PATCH] dmaengine: dmatest: Remove use of VLAs To: Laura Abbott , Vinod Koul , Dan Williams Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-hardening@lists.openwall.com, Kees Cook References: <20180409210603.3575-1-labbott@redhat.com> From: Sinan Kaya Message-ID: <4491bde2-cf38-5103-0634-1986ecd32a7c@codeaurora.org> Date: Mon, 9 Apr 2018 18:48:14 -0400 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <20180409210603.3575-1-labbott@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1597304199213101990?= X-GMAIL-MSGID: =?utf-8?q?1597349051712992898?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On 4/9/2018 5:06 PM, Laura Abbott wrote: > + /* dst_cnt can't be more than u8 */ > + dma_addr_t dma_pq[255]; This is 2k stack space on 64 bit architectures. Isn't that a lot? -- Sinan Kaya Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.