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powerpc/of: Remove useless register save/restore when calling OF back
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>
Thu, 23 Jul 2009 23:15:07 +0000 (23:15 +0000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Thu, 20 Aug 2009 00:12:36 +0000 (10:12 +1000)
enter_prom() used to save and restore registers such as CTR, XER etc..
which are volatile, or SRR0,1... which we don't care about. This
removes a bunch of useless code and while at it turns an mtmsrd into
an MTMSRD macro which will be useful to Book3E.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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