powerpc/cell/oprofile: fix mutex locking for spu-oprofile

[Paul Mackerras]

Arnd Bergmann writes:

> Paul, any chance we can still get this into 2.6.27?

Possibly.  We'll need a really good explanation for Linus as to why
this is needed (what regression or serious bug this fixes) and why it
is late.  Can you send me something explaining that?

> I've added the Ack and uploaded it again for you to
> pull from
> 
>  master.kernel.org:/pub/scm/linux/kernel/git/arnd/cell-2.6.git merge

Are you sure you actually managed to update that?

$ git ls-remote master.kernel.org:/pub/scm/linux/kernel/git/arnd/cell-2.6.git merge
f90a87b5f5fa46dc6c556e9267a6f25a95fbef14        refs/heads/merge

and f90a87b5f5fa46dc6c556e9267a6f25a95fbef14 is the same commit from
2008-08-09 that you asked me to pull previously.

Paul.