From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 25E01C4360F for ; Thu, 4 Apr 2019 09:54:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DEA8A2075E for ; Thu, 4 Apr 2019 09:54:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554371655; bh=aHx3hjDYKQkjyGsE2ZRx93zXo6zlWegeaqlcEdZLIUI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=O9op62j4+m8RD5V7rfGUlKKI4XnESe9rUNZoPASNi3Wq4Y37L/rH9b4rj2seE6a22 yzhplXisfCNB2MtykV+AHiO7tydaimekYsKxt2VHoBZFZep2D6uSndQn0eDNXQ18tE 1FKWRijGi6cZTcIkVxNBWkCs33hsEDUq51NZb2v4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728922AbfDDIwq (ORCPT ); Thu, 4 Apr 2019 04:52:46 -0400 Received: from mail.kernel.org ([198.145.29.99]:54908 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729212AbfDDIwo (ORCPT ); Thu, 4 Apr 2019 04:52:44 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B45D321850; Thu, 4 Apr 2019 08:52:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554367964; bh=aHx3hjDYKQkjyGsE2ZRx93zXo6zlWegeaqlcEdZLIUI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=e/9+9NapkGd/iA9b/OggGx7VSBo9Y58JbmPMtS//YZd5wTngXPATGBNgePFAMatYX 5YB4o0DyxT0HBrO3p4h4uDl3DwhdKJloe0VuaOcRNjynXuy3BcBWjMewayfVvMxM11 AQdsbcJfaipAVO9dO3kJCss3sARc0UYJAqoT/1i8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Buland Singh , Sasha Levin Subject: [PATCH 4.9 78/91] hpet: Fix missing = character in the __setup() code of hpet_mmap_enable Date: Thu, 4 Apr 2019 10:48:02 +0200 Message-Id: <20190404084539.963963008@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190404084535.450029272@linuxfoundation.org> References: <20190404084535.450029272@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit 24d48a61f2666630da130cc2ec2e526eacf229e3 ] Commit '3d035f580699 ("drivers/char/hpet.c: allow user controlled mmap for user processes")' introduced a new kernel command line parameter hpet_mmap, that is required to expose the memory map of the HPET registers to user-space. Unfortunately the kernel command line parameter 'hpet_mmap' is broken and never takes effect due to missing '=' character in the __setup() code of hpet_mmap_enable. Before this patch: dmesg output with the kernel command line parameter hpet_mmap=1 [ 0.204152] HPET mmap disabled dmesg output with the kernel command line parameter hpet_mmap=0 [ 0.204192] HPET mmap disabled After this patch: dmesg output with the kernel command line parameter hpet_mmap=1 [ 0.203945] HPET mmap enabled dmesg output with the kernel command line parameter hpet_mmap=0 [ 0.204652] HPET mmap disabled Fixes: 3d035f580699 ("drivers/char/hpet.c: allow user controlled mmap for user processes") Signed-off-by: Buland Singh Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/char/hpet.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c index 50272fe81f26..818a8d40e5c9 100644 --- a/drivers/char/hpet.c +++ b/drivers/char/hpet.c @@ -376,7 +376,7 @@ static __init int hpet_mmap_enable(char *str) pr_info("HPET mmap %s\n", hpet_mmap_enabled ? "enabled" : "disabled"); return 1; } -__setup("hpet_mmap", hpet_mmap_enable); +__setup("hpet_mmap=", hpet_mmap_enable); static int hpet_mmap(struct file *file, struct vm_area_struct *vma) { -- 2.19.1