Anton Blanchard 61e98ebff3 powerpc: Remove static branch prediction in atomic{, 64}_add_unless ...

I see quite a lot of static branch mispredictions on a simple
web serving workload. The issue is in __atomic_add_unless(), called
from _atomic_dec_and_lock(). There is no obvious common case, so it
is better to let the hardware predict the branch.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

2016-10-04 16:13:13 +11:00

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