From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:58624 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751174AbdAMIAa (ORCPT ); Fri, 13 Jan 2017 03:00:30 -0500 Subject: Patch "tools/virtio: fix READ_ONCE()" has been added to the 4.9-stable tree To: mark.rutland@arm.com, cornelia.huck@de.ibm.com, gregkh@linuxfoundation.org, jasowang@redhat.com, mst@redhat.com Cc: , From: Date: Fri, 13 Jan 2017 08:57:44 +0100 Message-ID: <148429426486239@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled tools/virtio: fix READ_ONCE() to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: tools-virtio-fix-read_once.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 5da889c795b1fbefc9d8f058b54717ab8ab17891 Mon Sep 17 00:00:00 2001 From: Mark Rutland Date: Thu, 24 Nov 2016 10:25:12 +0000 Subject: tools/virtio: fix READ_ONCE() From: Mark Rutland commit 5da889c795b1fbefc9d8f058b54717ab8ab17891 upstream. The virtio tools implementation of READ_ONCE() has a single parameter called 'var', but erroneously refers to 'val' for its cast, and thus won't work unless there's a variable of the correct type that happens to be called 'var'. Fix this with s/var/val/, making READ_ONCE() work as expected regardless. Fixes: a7c490333df3cff5 ("tools/virtio: use virt_xxx barriers") Signed-off-by: Mark Rutland Cc: Jason Wang Cc: Michael S. Tsirkin Cc: linux-kernel@vger.kernel.org Cc: virtualization@lists.linux-foundation.org Signed-off-by: Michael S. Tsirkin Reviewed-by: Cornelia Huck Reviewed-by: Jason Wang Signed-off-by: Greg Kroah-Hartman --- tools/virtio/linux/compiler.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/tools/virtio/linux/compiler.h +++ b/tools/virtio/linux/compiler.h @@ -4,6 +4,6 @@ #define WRITE_ONCE(var, val) \ (*((volatile typeof(val) *)(&(var))) = (val)) -#define READ_ONCE(var) (*((volatile typeof(val) *)(&(var)))) +#define READ_ONCE(var) (*((volatile typeof(var) *)(&(var)))) #endif Patches currently in stable-queue which might be from mark.rutland@arm.com are queue-4.9/tools-virtio-fix-read_once.patch queue-4.9/bus-arm-ccn-prevent-hotplug-callback-leak.patch