From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760239AbXGCQlY (ORCPT ); Tue, 3 Jul 2007 12:41:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756273AbXGCQkh (ORCPT ); Tue, 3 Jul 2007 12:40:37 -0400 Received: from smtp.polymtl.ca ([132.207.4.11]:44455 "EHLO smtp.polymtl.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755093AbXGCQkf (ORCPT ); Tue, 3 Jul 2007 12:40:35 -0400 Message-Id: <20070703164030.836768613@polymtl.ca> References: <20070703163818.785635235@polymtl.ca> User-Agent: quilt/0.46-1 Date: Tue, 03 Jul 2007 12:38:21 -0400 From: Mathieu Desnoyers To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org Cc: Mathieu Desnoyers Subject: [patch 2/3] Text Edit Lock - Alternative i386 Content-Disposition: inline; filename=text-edit-lock-alternative-i386.patch X-Poly-FromMTA: (dijkstra.casi.polymtl.ca [132.207.72.10]) at Tue, 3 Jul 2007 16:40:31 +0000 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org alternative.c can use the text edit lock to remove CPU HOTPLUG special cases. Signed-off-by: Mathieu Desnoyers --- arch/i386/kernel/alternative.c | 5 +++++ 1 file changed, 5 insertions(+) Index: linux-2.6-lttng/arch/i386/kernel/alternative.c =================================================================== --- linux-2.6-lttng.orig/arch/i386/kernel/alternative.c 2007-06-18 17:38:41.000000000 -0400 +++ linux-2.6-lttng/arch/i386/kernel/alternative.c 2007-06-18 17:42:30.000000000 -0400 @@ -4,6 +4,7 @@ #include #include #include +#include static int noreplace_smp = 0; static int smp_alt_once = 0; @@ -179,9 +180,11 @@ __FUNCTION__, a->instr, instr); } #endif + kernel_text_lock((unsigned long)instr, a->instrlen); memcpy(instr, a->replacement, a->replacementlen); diff = a->instrlen - a->replacementlen; nop_out(instr + a->replacementlen, diff); + kernel_text_unlock((unsigned long)instr, a->instrlen); } } @@ -346,6 +349,7 @@ for (p = start; p < end; p++) { unsigned int used; + kernel_text_lock((unsigned long)p->instr, p->len); used = paravirt_ops.patch(p->instrtype, p->clobbers, p->instr, p->len); @@ -353,6 +357,7 @@ /* Pad the rest with nops */ nop_out(p->instr + used, p->len - used); + kernel_text_unlock((unsigned long)p->instr, p->len); } /* Sync to be conservative, in case we patched following -- Mathieu Desnoyers Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68