Changing subject, the original thread is at [1], looping in lkml for a
wider audience for advice.
Que, Simon had written, on 08/11/2010 05:03 PM, the following:
just a curious question:
Is there no h/w spinlock implementation for other architectures in
linux? I mean the concept does not seem unique for a heterogenous
processor environments now a days.. if it does exist, maybe we have two
options:
* extend standard spinlock architecture to handle h/w spinlocks as well
* establish a new framework for h/w spinlocks..
Thank you for bringing that to my attention. I did a quick search and
> haven't found any hwspinlock module elsewhere. But should there be
> hwspinlocks over multiple architectures in the future, we can definitely
> consider something like the two solutions that you suggested, so that
> they can be used from platform-independent kernel code. However, right
> now we can develop OMAP hwspinlock independently of that.
I did glance through the kernel commit log, and nothing remotely seems
to match up at least in my opinion (closest seemed to be [2]
drivers/gpu/drm/ - but it did not seem relevant here). If this concept
is unique to OMAP family alone, then I guess it makes sense to introduce
SOC specific API library for usage. hoping for some suggestions to
enlighten us.
Ref:
[1] http://marc.info/?t=127955774200003&r=1&w=2
[2] http://dri.sourceforge.net/doc/hardware_locking_low_level.html
--
Regards,
Nishanth Menon
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