[PATCH] s390: cpu hotplug bugs.

From: Ursula Braun-Krahl <braunu@de.ibm.com>
From: Martin Schwidefsky <schwidefsky@de.ibm.com>

iucv driver changes:
 - Fix iucv declare/retrieve buffer which the cpu hotplug patch has broken.
 - Make smp_call_function_on call func(info) in non-smp kernels.
 - Use a spinlock to get smp_get_cpu/smp_put_cpu race free.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>