From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753255AbeBEPPk (ORCPT ); Mon, 5 Feb 2018 10:15:40 -0500 Received: from mout.kundenserver.de ([212.227.17.24]:42539 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753037AbeBEPPc (ORCPT ); Mon, 5 Feb 2018 10:15:32 -0500 From: Arnd Bergmann To: Andi Kleen Cc: nico@linaro.org, linux-kernel@vger.kernel.org, Arnd Bergmann , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org, David Woodhouse , Borislav Petkov Subject: [PATCH 2/2] x86: make __ibp_barrier visible Date: Mon, 5 Feb 2018 16:12:53 +0100 Message-Id: <20180205151300.539874-3-arnd@arndb.de> X-Mailer: git-send-email 2.9.0 In-Reply-To: <20180205151300.539874-1-arnd@arndb.de> References: <20180205151300.539874-1-arnd@arndb.de> X-Provags-ID: V03:K0:KZQT0FH1nAaojQPCyTPQCi7eKXrIHLjOGE0cGSR1vz8606thuJw nUYsffLfXxVy4qlwS3vmWWhY4SYp2F2fRtVoVSh6lgeEIEH7me+bhpyiXyZEuZKVakEKUIb +GbJDur/wmX4Cxuke3gIUa77jE0xflavd2TqByDE7KUeYCgWz9r/xMs4csfKDxj8p3L9Pu5 Ebry4maUxFkJNIWZN6sXw== X-UI-Out-Filterresults: notjunk:1;V01:K0:QnD3WMQzmSk=:Fh6bD7+Db7SB6d3eqHrF3J j0qlyeWxUeFYxsjThT5wTLa6RjWV3BqyhXVDFWIBvOksDJyV3SxrM5YRjEmE85nUn3PFRZi1y Ny/QRh/qM7cP8LeTxpN7iiP6wg+KJDnYPqkdnLqFzcGQrbOA4GPkqpxY7ZNvpWtEslAdGF3nu opgzEG1U8ZDwKRVgucTR2K59YzU/0/ITE5A6ndGDb5E/ShEMkICHIHF7Y8OO4Z9ZWoG/5gAIY v9tWLLqPteiu/C3fpYEyBukeIpCZmU++I41K4jSGLAtUjnXAr8rZRSoHhEv04Z6WT0FPh1+dB 5AuTrBM1U6UQfEbit7nIiNcwmAwx+B+/GsWLyD3v3l6LCT+PitX4Qo1EEyhkYMW/Vg+HaLwO5 OfKPFC0AjGu5ymH1dfC0FyNL7lL6i2E9IS4HLIddWx8OWaDEuvOGhLsSqYRZgeefZJpORtwqt datS3vPxEw6kXW72b/LByyc2fLUBy1knfZ6VmvQ1IRpP0xDAzktUHGc7YYl8Kotyh4287idE/ /bSmrEQ9M1ctrjl2RKJqYY6mNRiigxS9qDAtNauC/2kY4iQApEYJriOtDvNJlyNW1MRxeLtxE pf9qNCZKqohlVS84YaCCw6sv2jc2UFXAxFvXWAGUrlNM13r5h9bexrbRmcER5kMICtOC3aP0d D8SUP4Qht92OL2290g5iJKIEx/Sn0jlyJjohjhfVZyjBJTQ2WC8ZA8XCTQiKiJ/lo5mZonjcj UVYg+jqx/J+y9X0EiibwVtpQNCVIKYkubtXiCQ== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org LTO linking was broken by the addition of __ibp_barrier, which only has relocations from assembler code, and not from C, so the linker decides to drop it: ./ccfzUJ1l.ltrans0.ltrans.o:(.altinstr_replacement+0x42): undefined reference to `__ibp_barrier' Fixes: 64e16720ea08 ("x86/speculation: Simplify indirect_branch_prediction_barrier()") Signed-off-by: Arnd Bergmann --- arch/x86/kernel/cpu/bugs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c index 71949bf2de5a..c3f5fe1c6e83 100644 --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -338,7 +338,7 @@ ssize_t cpu_show_spectre_v2(struct device *dev, } #endif -void __ibp_barrier(void) +void __visible __ibp_barrier(void) { __wrmsr(MSR_IA32_PRED_CMD, PRED_CMD_IBPB, 0); } -- 2.9.0