linux-kernel - Re: [PATCHSET v2] ->follow_link() without dropping from RCU mode

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Message-ID: <20151210024049.GC20997@ZenIV.linux.org.uk>
Date:	Thu, 10 Dec 2015 02:40:50 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Neil Brown <neilb@...e.com>
Subject: Re: [PATCHSET v2] ->follow_link() without dropping from RCU mode

On Thu, Dec 10, 2015 at 12:10:12AM +0000, Al Viro wrote:

> PS: I toyed with the idea of replacing cookie a struct callback_head, to make

... except that it would have to be something like work_struct, since
callback_head gets embedded into the argument and here we don't want to
do that.  _And_ we've no use for ->entry in work_struct, which makes it
a bad fit as well.  IOW, please ignore that idiocy...
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