From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:37241 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934074AbcDLVA5 (ORCPT ); Tue, 12 Apr 2016 17:00:57 -0400 Subject: Patch "compiler-gcc: disable -ftracer for __noclone functions" has been added to the 4.5-stable tree To: pbonzini@redhat.com, akpm@linux-foundation.org, gregkh@linuxfoundation.org, lkml@tlinx.org, mmarek@suse.cz Cc: , From: Date: Tue, 12 Apr 2016 14:00:56 -0700 Message-ID: <14604948568177@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 compiler-gcc: disable -ftracer for __noclone functions to the 4.5-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: compiler-gcc-disable-ftracer-for-__noclone-functions.patch and it can be found in the queue-4.5 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 95272c29378ee7dc15f43fa2758cb28a5913a06d Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Thu, 31 Mar 2016 09:38:51 +0200 Subject: compiler-gcc: disable -ftracer for __noclone functions From: Paolo Bonzini commit 95272c29378ee7dc15f43fa2758cb28a5913a06d upstream. -ftracer can duplicate asm blocks causing compilation to fail in noclone functions. For example, KVM declares a global variable in an asm like asm("2: ... \n .pushsection data \n .global vmx_return \n vmx_return: .long 2b"); and -ftracer causes a double declaration. Cc: Andrew Morton Cc: Michal Marek Cc: kvm@vger.kernel.org Reported-by: Linda Walsh Signed-off-by: Paolo Bonzini Signed-off-by: Greg Kroah-Hartman --- include/linux/compiler-gcc.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/include/linux/compiler-gcc.h +++ b/include/linux/compiler-gcc.h @@ -199,7 +199,7 @@ #define unreachable() __builtin_unreachable() /* Mark a function definition as prohibited from being cloned. */ -#define __noclone __attribute__((__noclone__)) +#define __noclone __attribute__((__noclone__, __optimize__("no-tracer"))) #endif /* GCC_VERSION >= 40500 */ Patches currently in stable-queue which might be from pbonzini@redhat.com are queue-4.5/compiler-gcc-disable-ftracer-for-__noclone-functions.patch