From patchwork Fri Oct 4 04:23:58 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 11173645 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8A8E515AB for ; Fri, 4 Oct 2019 04:24:10 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 630EA207FF for ; Fri, 4 Oct 2019 04:24:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="B9hPUZxR" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 630EA207FF Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Owner; bh=IRgFHIYVuPOVV8LBlQwl2KohLNF7DuYEPabIkEvWP5M=; b=B9h PUZxRhWxOMlGDp4y3Xoy1A0yoScoSY9ZJSCHfBL7SnPbOJ1XuxV3ClgxMwqNX/dfuVGIoPxxb8I9U JBn/3NuzXZ1iESZBDnMJav6ChFcjisv7V8Xt+czr++IKYqRudwD2RQ/zLihhOk3Rq1y7mzSeBzeeL X5pHDC4jb0E10Lq7bqcB72huw7G5aK7n3Jz59WmbUOdgX3fdww4RJd70Eg5QOW+2GcxDkNVZU/Sg4 Qm3EW9eph8/oLPJNgXutVR8n3y9ocYtPQ2OgtWPF1P7ufB59sWfcE1VwH4SLCtwQnP1A4mFRQn2o4 QuHS0WFmdexlfRBBafFpkHMy3v30mMg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iGF8Q-00089a-P0; Fri, 04 Oct 2019 04:24:06 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iGF8M-00088X-TD for linux-arm-kernel@lists.infradead.org; Fri, 04 Oct 2019 04:24:04 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id AB6CC15A1; Thu, 3 Oct 2019 21:23:57 -0700 (PDT) Received: from p8cg001049571a15.arm.com (unknown [10.163.1.5]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id D5AF33F739; Thu, 3 Oct 2019 21:23:54 -0700 (PDT) From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org Subject: [PATCH] arm64/mm: Poison initmem while freeing with free_reserved_area() Date: Fri, 4 Oct 2019 09:53:58 +0530 Message-Id: <1570163038-32067-1-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191003_212402_985544_9CF5943F X-CRM114-Status: GOOD ( 11.79 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Catalin Marinas , Will Deacon , linux-kernel@vger.kernel.org, Anshuman Khandual MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Platform implementation for free_initmem() should poison the memory while freeing it up. Hence pass across POISON_FREE_INITMEM while calling into free_reserved_area(). The same is being followed in the generic fallback for free_initmem() and some other platforms overriding it. Cc: Catalin Marinas Cc: Will Deacon Cc: Mark Rutland Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual Reviewed-by: Steven Price Acked-by: Will Deacon --- arch/arm64/mm/init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index 45c00a54909c..ea7d38011e83 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -571,7 +571,7 @@ void free_initmem(void) { free_reserved_area(lm_alias(__init_begin), lm_alias(__init_end), - 0, "unused kernel"); + POISON_FREE_INITMEM, "unused kernel"); /* * Unmap the __init region but leave the VM area in place. This * prevents the region from being reused for kernel modules, which