From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Thu, 23 Jul 2009 23:15:07 +0000 (+0000)
Subject: powerpc/of: Remove useless register save/restore when calling OF back
X-Git-Tag: v2.6.32-rc1~675^2~105
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6c1719942e19936044c4673b18afa26e45a02320;p=pandora-kernel.git

powerpc/of: Remove useless register save/restore when calling OF back

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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