Stephen Warren <[email protected]> writes: > On 04/04/2016 09:44 PM, Eric Anholt wrote: >> dsb() requires an argument on arm64, so we needed to add "sy". >> Instead, take this opportunity to switch to the same smp_wmb() call >> that gic uses for its IPIs. This is a less strong barrier than we >> were doing before (dmb(ishst) compared to dsb(sy)), but it seems to be >> the correct one. > > I assume all MMIO is part of the ish domain? > > If so, the series, > Acked-by: Stephen Warren <[email protected]>
I don't know if this barrier implies ordering all the way out to AXI on this HW, but I don't think that's a requirement of this function.
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