From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga01.intel.com ([192.55.52.88]:34272 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751977AbdK0Vea (ORCPT ); Mon, 27 Nov 2017 16:34:30 -0500 From: Andi Kleen Subject: [PATCH 01/21] x86/xen: Mark pv stub assembler symbol visible Date: Mon, 27 Nov 2017 13:34:03 -0800 Message-Id: <20171127213423.27218-2-andi@firstfloor.org> In-Reply-To: <20171127213423.27218-1-andi@firstfloor.org> References: <20171127213423.27218-1-andi@firstfloor.org> Sender: linux-kbuild-owner@vger.kernel.org List-ID: To: linux-kernel@vger.kernel.org Cc: x86@kernel.org, samitolvanen@google.com, alxmtvv@gmail.com, linux-kbuild@vger.kernel.org, yamada.masahiro@socionext.com, akpm@linux-foundation.org, Andi Kleen From: Andi Kleen With LTO any external assembler symbol has to be marked __visible. Mark the generated asm PV stubs __visible to prevent a linker error. Signed-off-by: Andi Kleen --- arch/x86/include/asm/paravirt.h | 3 ++- drivers/xen/time.c | 2 +- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h index 283efcaac8af..cf2861aa4df0 100644 --- a/arch/x86/include/asm/paravirt.h +++ b/arch/x86/include/asm/paravirt.h @@ -745,7 +745,8 @@ static __always_inline bool pv_vcpu_is_preempted(long cpu) */ #define PV_THUNK_NAME(func) "__raw_callee_save_" #func #define PV_CALLEE_SAVE_REGS_THUNK(func) \ - extern typeof(func) __raw_callee_save_##func; \ + extern __visible typeof(func) __raw_callee_save_##func; \ + extern __visible typeof(func) func; \ \ asm(".pushsection .text;" \ ".globl " PV_THUNK_NAME(func) ";" \ diff --git a/drivers/xen/time.c b/drivers/xen/time.c index 3e741cd1409c..708a00c337d7 100644 --- a/drivers/xen/time.c +++ b/drivers/xen/time.c @@ -144,7 +144,7 @@ void xen_get_runstate_snapshot(struct vcpu_runstate_info *res) } /* return true when a vcpu could run but has no real cpu to run on */ -bool xen_vcpu_stolen(int vcpu) +__visible bool xen_vcpu_stolen(int vcpu) { return per_cpu(xen_runstate, vcpu).state == RUNSTATE_runnable; } -- 2.13.6