From: Martin Schwidefsky <schwidefsky@de.ibm.com>

Common i/o layer changes:
 - qdio: Lose the adapter lock for thin interrupts to improve performance
   and do unregister of the adapter interrupt handler with rcu.
 - ccwgroup: Fix error handling when creating a ccwgroup device.
 - Convert the slow crw kernel thread to a single threaded workqueue.
 - Use the slow crw workqueue to unregister a subchannel after it was
   found not operational to serialize it with other possible unregister/
   register events coming in via machine checks.
 - Trigger a rescan of the css via the slow path if a missing channel path
   is found in __recover_lost_chpids.
 - Use saner default levels for the debug feature, add some debugging code.
 - Remove request_irq and free_irq stubs.
 - Remove bogus inlines.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>