tile: clarify barrier semantics of atomic_add_return
A recent discussion on LKML made it clear that the one-line
comment previously in atomic_add_return() was not clear enough:
https://lkml.kernel.org/r/571E87E2.3010306@mellanox.com
Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com>
parent
85f52517
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