tree 6a1e6ab37fa42ae1847f2ff44f26270dc6848c7c
parent cd5aeb9f6cf7ada6baa218e01b4299e201497cde
author Michael Ellerman <michael@ellerman.id.au> 1216182094 +1000
committer Paul Mackerras <paulus@samba.org> 1219214097 +1000

powerpc: Streamline ret_from_except_lite for non-iSeries platforms

There is a small passage of code in ret_from_except_lite which is
only required on iSeries.  For a multi-platform kernel on non-iSeries
machines this means we end up executing ~15 nops in ret_from_except_lite.

It would be nicer if non-iSeries could skip the code entirely, and on
iSeries we can jump out of line to execute the code.

I have no performance numbers to justify this, other than the assertion
that executing 15 nops takes longer than executing 0.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>