powerpc: Initialise paca.data_offset with poison

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It's possible for the cpu_possible_mask to change between the time we
initialise the pacas and the time we setup per_cpu areas.

Obviously impossible cpus shouldn't ever be running, but stranger things
have happened. So be paranoid and initialise data_offset with a poison
value in case we don't set it up later.

Based on a patch from Anton Blanchard.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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Michael Ellerman 2012-09-07 15:31:44 +00:00 • committed by Benjamin Herrenschmidt

parent 06c8876668

commit 407821a34f

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arch/powerpc/kernel/paca.c

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