linux-kernel - Re: [PATCH] vfs: fix race in rcu lookup of pruned dentry

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Message-ID: <20110720014014.GV11013@ZenIV.linux.org.uk>
Date:	Wed, 20 Jul 2011 02:40:14 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	NeilBrown <neilb@...e.de>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Hugh Dickins <hughd@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Nick Piggin <npiggin@...nel.dk>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH] vfs: fix race in rcu lookup of pruned dentry

On Wed, Jul 20, 2011 at 10:47:21AM +1000, NeilBrown wrote:
> > > 
> > > Kudos to neilb for spotting the pointless check, BTW; and no, his theory
> > > that it might be needed since we could race with umount() is wrong - due to
> > > vfsmount_lock being held.
> 
> Thanks.. but that patch seems to introduce an unused variable "seq".
> 
> NeilBrown

Grr...  I can amend and push again, of course, but I've no idea if Linus
has already pulled into his tree ;-/  Still not there in tree on hera,
but that's not saying much.  Linus?
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