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(parent: 5a68708) | patch
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)
commit8971ba9098ebd2fad8d5577f0b0ffdae733e130a
treed235739a709ecf4f36d28ad34b80f8930ef525b1tree | snapshot
parent5a6870808fd1305f0a097622571d0a9415f9213dcommit | diff
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>
arch/powerpc/kernel/entry_64.S diff | blob | history
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