From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: [PATCH] compiler-gcc: disable -ftracer for __noclone functions Date: Thu, 31 Mar 2016 09:44:12 +0200 Message-ID: <1459410252-15531-1-git-send-email-pbonzini@redhat.com> Cc: lkml@tlinx.org, Andrew Morton , Michal Marek , stable@vger.kernel.org To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Return-path: Sender: stable-owner@vger.kernel.org List-Id: kvm.vger.kernel.org -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: stable@vger.kernel.org Cc: kvm@vger.kernel.org Reported-by: Linda Walsh Signed-off-by: Paolo Bonzini --- include/linux/compiler-gcc.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h index 22ab246feed3..eeae401a2412 100644 --- 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 */ -- 2.5.5