RE: [PATCH v1 14/20] ARC: [plat-eznps] Use dedicated SMP barriers

From: Noam Camus
Date: Mon Nov 02 2015 - 08:09:05 EST

From: Vineet Gupta [mailto:Vineet.Gupta1@xxxxxxxxxxxx]
Sent: Monday, November 02, 2015 10:03 AM

> Do u need this even for mandatory barriers whose semantics are not related to SMP at all ? I think you need them only for smb_*
Yes I do.
For example it is used to proceed access to our Global Interrupt Manager (GIM) when we want to make sure that driver of some device committed all read/writes before we are acknowledging the GIM.
We are not falling to use "sync" since we prefer to have HW thread schedule in the meantime we wait for load/store to be done.

- Noam
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