powerpc: Partial revert of "Context switch more PMU related SPRs"

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In commit 59affcd I added context switching of more PMU SPRs, because
they are potentially exposed to userspace on Power8. However despite me
being a smart arse in the commit message it's actually not correct. In
particular it interacts badly with a global perf record.

We will have to do something more complicated, but that will have to
wait for 3.11.

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

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Michael Ellerman 2013-06-05 18:03:36 +00:00 • committed by Benjamin Herrenschmidt

parent 6772faa1ba

commit b11ae95100

1 changed files with 0 additions and 28 deletions

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arch/powerpc/kernel/entry_64.S

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