Re: MIPS: Avoid clobbering struct pt

To:	Ralf Rösch <ralf.roesch@rw-gmbh.de>
Subject:	Re: MIPS: Avoid clobbering struct pt_regs in kthreads
From:	David Daney <ddaney@caviumnetworks.com>
Date:	Wed, 12 Aug 2009 14:22:51 -0700
Cc:	linux-mips <linux-mips@linux-mips.org>
In-reply-to:	<4A832E6E.8020300@rw-gmbh.de>
Original-recipient:	rfc822;linux-mips@linux-mips.org
References:	<4A832E6E.8020300@rw-gmbh.de>
Sender:	linux-mips-bounce@linux-mips.org
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Ralf Rösch wrote:

Hi David,
Sorry to say, but your commit d406c9ae84d6ef12c55a41c97c34266b2eb7ed31makes my TX49xx (Toshiba RISC mipsel) based system unusable.
The kernel boots fine until the stage:
   Freeing unused kernel memory: 140k freed
and then stops.
Some of our LEDS are updated as supposed, so a part of the kernel shouldbe running.
Reverting your commit makes the latest 2.4.37.4 kernel usable again.
Do you have an idea what might go wrong?


I'm sorry, I can't think of anything.

I would look in copy_thread and the kthread spawning code. Does TX49xxhave custom versions of these?


David Daney

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Re: MIPS: Avoid clobbering struct pt_regs in kthreads