robust mutexes

[ccmail111]

Hi,
 
I am looking for robust mutex implementation. I would like to know which one of below
is part of 2.6.31 and above releases ?
 
Looking at:
1)  http://www.embedded-linux.co.uk/tutorial/mutex_mutandis
2) http://devresources.linuxfoundation.org/dev/robustmutexes/
 
Is the support for both available on 2.6.31 ? If not, which one ?
 
Any pointers/suggestions appreciated.
 
Thanks,
 
SK.