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This patch adds support for the new "jump label" feature.
Unlike x86 and sparc we just merrily patch the code with no locks etc,
as far as I know this is safe, but I'm not really sure what the x86/sparc
code is protecting against so maybe it's not.
I also don't see any reason for us to implement the poke_early() routine,
even though sparc does.
[BenH: Updated the patch to upstream generic changes]
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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