From: K.Prasad Date: Mon, 1 Jun 2009 18:15:03 +0000 (+0530) Subject: hw-breakpoints: modify signal handling code to refrain from re-enabling HW Breakpoints X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=da0cdc14f5f7e0faee6b2393fefed056cdb17146;p=deliverable%2Flinux.git hw-breakpoints: modify signal handling code to refrain from re-enabling HW Breakpoints 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 --- diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c index 14425166b8e3..f33d2e0ef095 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) { /*