linuxthreads changes from upstream

[Bernhard Reutner-Fischer]

On Sun, Nov 16, 2008 at 07:13:08AM +0100, Carmelo Amoroso wrote:
>Matt Fleming wrote:
>> Hi,
>> 
>> the attached patch contains some fixes from linuxthreads HEAD. The patch
>> should apply against trunk. This patch was initially proposed by Will Newton
>> on Aug 27, I've just brought it up to date. Amongst other things it fixes a
>> bug that a customer was seeing with mutex lock/unlock timing issues.
>> 
>> Matt
>> 
>> 
>Hi Matt,
>I think providing some explanation about the proposed change it's important,
>instead of simply saying some fixes. Further what is the customer's bug, and
>which piece of this patch is intended to fix it.
>And keeping probably unrelated changes into one only patch is not so comfortable
>for review.

I commented on the patch on IRC already, please address my (cosmetic)
concerns before you resend..