linux-kernel - [PATCH 4/7] traps: x86_64: remove trace_hardirqs

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Message-Id: <1222430588-29072-5-git-send-email-heukelum@fastmail.fm>
Date:	Fri, 26 Sep 2008 14:03:05 +0200
From:	Alexander van Heukelum <heukelum@...tmail.fm>
To:	Ingo Molnar <mingo@...e.hu>, lkml <linux-kernel@...r.kernel.org>
Cc:	Alexander van Heukelum <heukelum@...tmail.fm>
Subject: [PATCH 4/7] traps: x86_64: remove trace_hardirqs_fixup from int3 handler

All exceptions are taken via interrupt gates. TRACE_IRQS_OFF
is called just before entering the C code, so the irq state
is known to the irq tracer at this point. No need to call
trace_hardirqs_fixup.

Signed-off-by: Alexander van Heukelum <heukelum@...tmail.fm>
---
 arch/x86/kernel/traps_64.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/traps_64.c b/arch/x86/kernel/traps_64.c
index 04b163e..2ff759e 100644
--- a/arch/x86/kernel/traps_64.c
+++ b/arch/x86/kernel/traps_64.c
@@ -857,8 +857,6 @@ void restart_nmi(void)
 /* runs on IST stack. */
 asmlinkage void __kprobes do_int3(struct pt_regs *regs, long error_code)
 {
-	trace_hardirqs_fixup();
-
 	if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
 			== NOTIFY_STOP)
 		return;
-- 
1.5.4.3

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