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Date:	Sun, 16 Jun 2013 14:12:47 +0930
From:	Rusty Russell <>
Cc:	Rusty Russell <>,,
	"K.Prasad" <>
Subject: [PATCH 8/9] x86: remove weird PTR_ERR() in do_debug

62edab905 changed the argument to notify_die() from dr6 to &dr6, but weirdly,
used PTR_ERR() to cast it to a long.  Since dr6 is on the stack, this is
an abuse of PTR_ERR().  Cast to long, as per kernel standard.

Cc: K.Prasad <>
Signed-off-by: Rusty Russell <>
 arch/x86/kernel/traps.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index 772e2a8..9340dfb 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -437,7 +437,7 @@ dotraplinkage void __kprobes do_debug(struct pt_regs *regs, long error_code)
 	/* Store the virtualized DR6 value */
 	tsk->thread.debugreg6 = dr6;
-	if (notify_die(DIE_DEBUG, "debug", regs, PTR_ERR(&dr6), error_code,
+	if (notify_die(DIE_DEBUG, "debug", regs, (long)&dr6, error_code,
 		goto exit;

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