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powerpc: Restore VDSO information on critical exception om BookE
authorMihai Caraman <mihai.caraman@freescale.com>
Thu, 6 Sep 2012 02:49:44 +0000 (02:49 +0000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Thu, 6 Sep 2012 23:48:49 +0000 (09:48 +1000)
Critical exception on 64-bit booke uses user-visible SPRG3 as scratch.
Restore VDSO information in SPRG3 on exception prolog.

Use a common sprg3 field in PACA for all powerpc64 architectures.

Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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