From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Wed, 28 Sep 2016 06:12:27 +0000 (+0200)
Subject: Revert "drivers/tty: Explicitly pass current to show_stack"
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=094a32626f904f92beda174154daca3fe4455890;p=linux-beck.git

Revert "drivers/tty: Explicitly pass current to show_stack"

This reverts commit 9f12cea96f47f98d612a0a0b84f950a0163731bf.

Mark writes:
	Unfortunately, this patch will result in erroneous stack traces
	on some architectures. Sorry about this; I should have verified
	this more thoroughly before sending the series out.

	Please drop the patch at your earliest convenience.

Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
index 5b1e0edacb84..52bbd27e93ae 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -224,7 +224,7 @@ static void showacpu(void *dummy)
 
 	spin_lock_irqsave(&show_lock, flags);
 	pr_info("CPU%d:\n", smp_processor_id());
-	show_stack(current, NULL);
+	show_stack(NULL, NULL);
 	spin_unlock_irqrestore(&show_lock, flags);
 }