linux-kernel - Re: [PATCH] staging/lustre: use rcu_dereference to access rcu protected current->real

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Message-ID: <20140806214216.GA16530@kroah.com>
Date:	Wed, 6 Aug 2014 14:42:16 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Evgeny Budilovsky <budevg@...il.com>
Cc:	Andreas Dilger <andreas.dilger@...el.com>,
	Oleg Drokin <green@...uxhacker.ru>,
	Peng Tao <bergwolf@...il.com>, Lai Siyao <lai.siyao@...el.com>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging/lustre: use rcu_dereference to access rcu
 protected current->real_parent field

On Wed, Aug 06, 2014 at 09:22:43PM +0300, Evgeny Budilovsky wrote:
> 
> 
> Signed-off-by: Evgeny Budilovsky <budevg@...il.com>

Why is this needed?  Is the current code a bug?  Where was the reference
added?  Is this causing a problem without this patch applied?  How far
back should it be backported, if at all?

I need lots more details here before I can take this patch, sorry.

greg k-h
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