From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757548AbbFQAhy (ORCPT ); Tue, 16 Jun 2015 20:37:54 -0400 Received: from mail.kernel.org ([198.145.29.136]:54515 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757505AbbFQAhd (ORCPT ); Tue, 16 Jun 2015 20:37:33 -0400 From: Andy Lutomirski To: x86@kernel.org Cc: Borislav Petkov , Peter Zijlstra , John Stultz , linux-kernel@vger.kernel.org, Len Brown , Huang Rui , Denys Vlasenko , kvm@vger.kernel.org, Ralf Baechle , Andy Lutomirski Subject: [PATCH v3 18/18] x86/tsc: Remove rdtsc_barrier() Date: Tue, 16 Jun 2015 17:36:06 -0700 Message-Id: <9baa4ae9a1e7c7c282f9cb2f15bb6bf5c2004032.1434501121.git.luto@kernel.org> X-Mailer: git-send-email 2.4.2 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org All callers have been converted to rdtsc_ordered(). Signed-off-by: Andy Lutomirski --- arch/x86/include/asm/barrier.h | 11 ----------- arch/x86/um/asm/barrier.h | 13 ------------- 2 files changed, 24 deletions(-) diff --git a/arch/x86/include/asm/barrier.h b/arch/x86/include/asm/barrier.h index e51a8f803f55..818cb8788225 100644 --- a/arch/x86/include/asm/barrier.h +++ b/arch/x86/include/asm/barrier.h @@ -91,15 +91,4 @@ do { \ #define smp_mb__before_atomic() barrier() #define smp_mb__after_atomic() barrier() -/* - * Stop RDTSC speculation. This is needed when you need to use RDTSC - * (or get_cycles or vread that possibly accesses the TSC) in a defined - * code region. - */ -static __always_inline void rdtsc_barrier(void) -{ - alternative_2("", "mfence", X86_FEATURE_MFENCE_RDTSC, - "lfence", X86_FEATURE_LFENCE_RDTSC); -} - #endif /* _ASM_X86_BARRIER_H */ diff --git a/arch/x86/um/asm/barrier.h b/arch/x86/um/asm/barrier.h index b9531d343134..755481f14d90 100644 --- a/arch/x86/um/asm/barrier.h +++ b/arch/x86/um/asm/barrier.h @@ -45,17 +45,4 @@ #define read_barrier_depends() do { } while (0) #define smp_read_barrier_depends() do { } while (0) -/* - * Stop RDTSC speculation. This is needed when you need to use RDTSC - * (or get_cycles or vread that possibly accesses the TSC) in a defined - * code region. - * - * (Could use an alternative three way for this if there was one.) - */ -static inline void rdtsc_barrier(void) -{ - alternative_2("", "mfence", X86_FEATURE_MFENCE_RDTSC, - "lfence", X86_FEATURE_LFENCE_RDTSC); -} - #endif -- 2.4.2