Re: atomic RAM ?

[Michael Schnell]

On 04/08/2010 04:15 PM, Arnd Bergmann wrote:
> /* returns one if we got the lock, zero if someone else holds it */
> bool hashlock_addr(volatile void *addr);
>   
I don't see how (to do FUTEX) a hashlock can be implemented in a way
that we stay in user mode when locking it and - if it's already locked -
we do a Kernel call for waiting on it being unlocked by another thread.
(This is what FUTEX does.)

-Michael
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