tree 0cf697f96e734a846ee1cbc598beebcc7be10117
parent 4beee64685e116b01c47655daf6d88df87e053c8
author Peter Oberparleiter <peter.oberparleiter@de.ibm.com> 1201353048 +0100
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1201353063 +0100

[S390] cio: reduce cpu utilization during device scan

Minimize calls to cpu intensive function get_subchannel_by_schid()
by introducing function for_each_subchannel_staged() which
temporarily caches the information about registered subchannels
in a bitmap.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>