RE: [PATCH 0/4] Add lightweight memory barriers fast_rmb() and fast_wmb()

From: David Laight
Date: Tue Nov 18 2014 - 04:58:03 EST

From: Alexander Duyck
> These patches introduce two new primitives for synchronizing cache-enabled
> memory writes and reads. These two new primitives are:
> fast_rmb()
> fast_wmb()

Not sure I like the names.
If the aim is to sync data into the local cache so that hardware
that is doing cache-snooping accesses sees the data then maybe
local_rmb() and local_wmb()

IIRC read_barrier_depends() is a nop on everything except alpha.
Maybe add the default if it isn't defined by the MD file?