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Date: Thu, 28 Jun 2012 18:22:53 +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>,
        David Howells <dhowells@redhat.com>
Subject: Re: [PATCH 0/4] Was: deferring __fput()
Message-ID: <20120628162253.GA25357@redhat.com>
References: <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> <20120624153310.GB24596@redhat.com> <20120625060357.GT14083@ZenIV.linux.org.uk> <20120625151812.GA16062@redhat.com> <20120627183721.GA23086@redhat.com> <20120628043836.GW14083@ZenIV.linux.org.uk>
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On 06/28, Al Viro wrote:
>
> The list removal logics in mine looks really ugly ;-/

Basically the code is almost the same as mine.

But task_work_add() can be simplified a bit, no need to check
last != NULL twice.

	last = task->task_works ?: twork;
	task->last_twork = twork;
	twork->next = last->next;	/* XXX */
	last->next = twork;

If ->task_works == NULL, then XXX is meaningless but safe.

Oleg.