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Subject[RFC][PATCH 0/3] Clocklib: generic clocks management framework

Here is second attempt to introduce clocks management framework based on
kobjects. This attempt goes a bit further. I've removed the global
spinlock. All add/remove operations are guarded via built into clocks kset
spinlock. And all per-clock operations are guided by built-in atomic
counter variable. I can split it into counter and per-clock spinlock,
but I think it will be a waste of space.

Also as suggested by Andrew Morton, I've split the set_mode operation
back to enable/disable.

With best wishes

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