tree bfae4443c70ee88c54aa9743ca19ed122af45f8f
parent 8dc16c6c04b1a82d00a8464ccc08e1fe17d0ff82
author Christoph Lameter <cl@linux.com> 1304627034 -0500
committer Pekka Enberg <penberg@kernel.org> 1304789138 +0300

slub: Remove CONFIG_CMPXCHG_LOCAL ifdeffery

Remove the #ifdefs. This means that the irqsafe_cpu_cmpxchg_double() is used
everywhere.

There may be performance implications since:

A. We now have to manage a transaction ID for all arches

B. The interrupt holdoff for arches not supporting CONFIG_CMPXCHG_LOCAL is reduced
to a very short irqoff section.

There are no multiple irqoff/irqon sequences as a result of this change. Even in the fallback
case we only have to do one disable and enable like before.

Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>