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Date: Tue, 10 Apr 2001 15:33:57 +0900
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From: Tachino Nobuhiro <tachino@open.nm.fujitsu.co.jp>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Tachino Nobuhiro <tachino@open.nm.fujitsu.co.jp>,
        Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: rw_semaphores
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At Mon, 9 Apr 2001 22:43:53 -0700 (PDT),
Linus Torvalds wrote:

> The ordering is certainly possible, but if it happens,
> __down_read_failed() won't actually sleep, because it will notice that the
> value is positive and just return immediately. So it will do some
> unnecessary work (add itself to the wait-queue only to remove itself
> immediately again), but it will do the right thing.
> 
> 		Linus
> 

  I understand. Thank you.