tree 4b9d330f855627807b4d7eab0b888bcb30403b32
parent a2f7a9ce2a5c3d21cc0eb37a03da603b44ba4b09
author Anton Blanchard <anton@samba.org> 1120784172 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1120785817 -0700

[PATCH] ppc64: Turn runlatch on in exception entry

Enable the runlatch at the start of each exception.  Unfortunately we are out
of space in the 0x300 handler, so I added it a bit later.

The SPR write is fairly expensive, perhaps we should cache the runlatch state
in the paca and avoid the write when possible.

We don't need to turn the runlatch off, we do that in the idle loop.  Better
to take the hit in the idle loop than for each exception exit.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>