From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752647Ab1IOAnC (ORCPT ); Wed, 14 Sep 2011 20:43:02 -0400 Received: from claw.goop.org ([74.207.240.146]:38277 "EHLO claw.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752592Ab1IOAm7 (ORCPT ); Wed, 14 Sep 2011 20:42:59 -0400 From: Jeremy Fitzhardinge To: "H. Peter Anvin" Cc: Linus Torvalds , Peter Zijlstra , Ingo Molnar , the arch/x86 maintainers , Linux Kernel Mailing List , Nick Piggin , Avi Kivity , Marcelo Tosatti , KVM , Andi Kleen , Xen Devel , Jeremy Fitzhardinge Subject: [PATCH 01/10] x86/ticketlocks: remove obsolete comment Date: Wed, 14 Sep 2011 17:31:33 -0700 Message-Id: X-Mailer: git-send-email 1.7.6 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 From: Jeremy Fitzhardinge The note about partial registers is not really relevent now that we rely on gcc to generate all the assembler. Signed-off-by: Jeremy Fitzhardinge --- arch/x86/include/asm/spinlock.h | 4 ---- 1 files changed, 0 insertions(+), 4 deletions(-) diff --git a/arch/x86/include/asm/spinlock.h b/arch/x86/include/asm/spinlock.h index f5695ee..972c260 100644 --- a/arch/x86/include/asm/spinlock.h +++ b/arch/x86/include/asm/spinlock.h @@ -49,10 +49,6 @@ * issues and should be optimal for the uncontended case. Note the tail must be * in the high part, because a wide xadd increment of the low part would carry * up and contaminate the high part. - * - * With fewer than 2^8 possible CPUs, we can use x86's partial registers to - * save some instructions and make the code more elegant. There really isn't - * much between them in performance though, especially as locks are out of line. */ static __always_inline void __ticket_spin_lock(arch_spinlock_t *lock) { -- 1.7.6