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powerpc: Remove comment about read_barrier_depends()

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'read_barrier_depends()' doesn't exist anymore so stop talking about it.

Signed-off-by: Will Deacon <will@kernel.org>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Will Deacon 2019-11-08 17:01:18 +00:00 • committed by Paul E. McKenney
parent 05d35961c2
commit c7e9c01f92
1 changed files with 0 additions and 2 deletions
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2
arch/powerpc/include/asm/barrier.h
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@ -18,8 +18,6 @@
* mb() prevents loads and stores being reordered across this point.
* rmb() prevents loads being reordered across this point.
* wmb() prevents stores being reordered across this point.
* read_barrier_depends() prevents data-dependent loads being reordered
* across this point (nop on PPC).
*
* *mb() variants without smp_ prefix must order all types of memory
* operations with one another. sync is the only instruction sufficient