linux-kernel - [patch, for 2.6.29] x86, bts: remove bad warning

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Message-ID: <20090305084954.A22000@sedona.ch.intel.com>
Date:	Thu, 5 Mar 2009 08:49:54 +0100
From:	Markus Metzger <markus.t.metzger@...el.com>
To:	linux-kernel@...r.kernel.org, mingo@...e.hu, tglx@...utronix.de,
	hpa@...or.com
Cc:	markus.t.metzger@...el.com, markus.t.metzger@...il.com,
	roland@...hat.com, eranian@...glemail.com, oleg@...hat.com,
	juan.villacis@...el.com, ak@...ux.jf.intel.com
Subject: [patch, for 2.6.29] x86, bts: remove bad warning

In case a ptraced task is reaped (while the tracer is still attached),
ds_exit_thread() is called before ptrace_exit(). The latter will
release the bts_tracer and remove the thread's ds_ctx.
The former will WARN() if the context is not NULL.

Oleg Nesterov submitted patches that move ptrace_exit() before
exit_thread() and thus reverse the order of the above calls.

Remove the bad warning. I will add it again when Oleg's changes are in.

Signed-off-by: Markus Metzger <markus.t.metzger@...el.com>
---

Index: gits/arch/x86/kernel/ds.c
===================================================================
--- gits.orig/arch/x86/kernel/ds.c	2009-03-05 08:14:38.000000000 +0100
+++ gits/arch/x86/kernel/ds.c	2009-03-05 08:15:21.000000000 +0100
@@ -1029,5 +1029,4 @@ void ds_copy_thread(struct task_struct *

 void ds_exit_thread(struct task_struct *tsk)
 {
-	WARN_ON(tsk->thread.ds_ctx);
 }
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