linux-kernel - Re: [patch 1/3] mm: pagecache write deadlocks zerolength fix

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Message-ID: <jeac29teeu.fsf@sykes.suse.de>
Date:	Thu, 30 Nov 2006 11:30:33 +0100
From:	Andreas Schwab <schwab@...e.de>
To:	Nick Piggin <npiggin@...e.de>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>, linux-fsdevel@...r.kernel.org
Subject: Re: [patch 1/3] mm: pagecache write deadlocks zerolength fix

Nick Piggin <npiggin@...e.de> writes:

> On Thu, Nov 30, 2006 at 11:15:39AM +0100, Andreas Schwab wrote:
>> Nick Piggin <npiggin@...e.de> writes:
>> 
>> > writev with a zero-length segment is a noop, and we shouldn't return EFAULT.
>> 
>> AFAICS the callers of these functions never pass a zero length.
>
> They can in the case of a zero length write.

How?  All (indirect) callers I could find explicitly handle the
zero-length case.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@...e.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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