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Date: Sun, 24 Jun 2012 18:54:33 +0200
From: Oleg Nesterov <oleg@redhat.com>
To: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Mimi Zohar <zohar@linux.vnet.ibm.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        ". James Morris" <jmorris@namei.org>,
        linux-security-module@vger.kernel.org,
        linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: deferring __fput()
Message-ID: <20120624165433.GA1211@redhat.com>
References: <1340369098.2464.20.camel@falcor> <20120623092049.GH14083@ZenIV.linux.org.uk> <20120623194505.GI14083@ZenIV.linux.org.uk> <20120623203800.GA10306@redhat.com> <20120623210141.GK14083@ZenIV.linux.org.uk> <20120624041652.GN14083@ZenIV.linux.org.uk> <20120624100908.GR14083@ZenIV.linux.org.uk>
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On 06/24, Al Viro wrote:
>
> in vfs.git#untested.

include/linux/types.h:

	#define rcu_head callback_head

OK, now I understand why did you want task_work/rcu identical.

So, you are not going to add a rcu/task_work union in (say)
struct cred, task_work_add() should "silently" reuse cred->rcu.

OK, perhaps this makes more sense...

Oleg.