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(parent: 948cf4a) | patch
s390/cio: convert cfg_lock mutex to spinlock
authorSebastian Ott <sebott@linux.vnet.ibm.com>
Tue, 19 Jul 2016 08:43:26 +0000 (10:43 +0200)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Sun, 31 Jul 2016 09:27:57 +0000 (05:27 -0400)
commit07d3848995601d8ffaf2a93bb03432eb097da90b
treeab60a16d9c19efc26e5a9253bcf96703cd1b65b7tree | snapshot
parent948cf4a7563f91021e87e94b5bc49c2376f61ad1commit | diff
s390/cio: convert cfg_lock mutex to spinlock

cfg_lock is never held long and we don't want to sleep while the
lock is being held. Thus it can be converted to a simple spinlock.
In addition we can now use the lock during the evaluation of a
wake_up condition.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
drivers/s390/cio/chp.c diff | blob | history
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