Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756197AbZFBWpo (ORCPT ); Tue, 2 Jun 2009 18:45:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755392AbZFBWnt (ORCPT ); Tue, 2 Jun 2009 18:43:49 -0400 Received: from fg-out-1718.google.com ([72.14.220.153]:5254 "EHLO fg-out-1718.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755363AbZFBWnr (ORCPT ); Tue, 2 Jun 2009 18:43:47 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; b=xHsbVGOzKxUVnWRKRciSa8w4EvywIB4wE8QEBK7SNyA0kL9wT0D826cliNtsMU08gj 8ineoj4riEm6EdBPygD/zF8cTstk8GbXpMjGpNkFVEdIT2mFMXCdjDGJFZTWHFlutNul 6yWx8obObVH9+0s7rewD06rerAr8Pv4Jt/Sy8= From: Frederic Weisbecker To: Ingo Molnar Cc: LKML , "K.Prasad" , Steven Rostedt , Alan Stern , Frederic Weisbecker Subject: [PATCH 07/12] hw-breakpoints: modify signal handling code to refrain from re-enabling HW Breakpoints Date: Wed, 3 Jun 2009 00:43:31 +0200 Message-Id: <1243982616-18212-8-git-send-email-fweisbec@gmail.com> X-Mailer: git-send-email 1.6.2.3 In-Reply-To: <1243982616-18212-1-git-send-email-fweisbec@gmail.com> References: <1243982616-18212-1-git-send-email-fweisbec@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1470 Lines: 41 From: K.Prasad This patch disables re-enabling of Hardware Breakpoint registers through the signal handling code. This is now done during from hw_breakpoint_handler(). Original-patch-by: Alan Stern Signed-off-by: K.Prasad Reviewed-by: Alan Stern Signed-off-by: Frederic Weisbecker --- arch/x86/kernel/signal.c | 9 --------- 1 files changed, 0 insertions(+), 9 deletions(-) diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c index 1442516..f33d2e0 100644 --- a/arch/x86/kernel/signal.c +++ b/arch/x86/kernel/signal.c @@ -800,15 +800,6 @@ static void do_signal(struct pt_regs *regs) signr = get_signal_to_deliver(&info, &ka, regs, NULL); if (signr > 0) { - /* - * Re-enable any watchpoints before delivering the - * signal to user space. The processor register will - * have been cleared if the watchpoint triggered - * inside the kernel. - */ - if (current->thread.debugreg7) - set_debugreg(current->thread.debugreg7, 7); - /* Whee! Actually deliver the signal. */ if (handle_signal(signr, &info, &ka, oldset, regs) == 0) { /* -- 1.6.2.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/