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Date: Sun, 15 Feb 2009 16:04:59 +0530 From: "K.Prasad" <prasad@...ux.vnet.ibm.com> To: Ingo Molnar <mingo@...e.hu> Cc: Andrew Morton <akpm@...ux-foundation.org>, Alan Stern <stern@...land.harvard.edu>, Roland McGrath <roland@...hat.com>, richardj_moore@...ibm.com, jason.wessel@...driver.com, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: [Patch 7/10] Modify signal handling code to refrain from re-enabling HW Breakpoints Modify signal handling code to refrain from re-enabling HW Breakpoints From: Alan Stern <stern@...land.harvard.edu> This patch disables re-enabling of Hardware Breakpoint registers through the signal handling code. This is now done during hw_breakpoint_handler(). Signed-off-by: K.Prasad <prasad@...ux.vnet.ibm.com> Signed-off-by: Alan Stern <stern@...land.harvard.edu> --- arch/x86/kernel/signal.c | 9 --------- 1 file changed, 9 deletions(-) Index: linux-2.6-tip.hbkpt/arch/x86/kernel/signal.c =================================================================== --- linux-2.6-tip.hbkpt.orig/arch/x86/kernel/signal.c +++ linux-2.6-tip.hbkpt/arch/x86/kernel/signal.c @@ -803,15 +803,6 @@ static void do_signal(struct pt_regs *re 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) { /* -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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