diff options
| author | Peter Oberparleiter <oberpar@linux.vnet.ibm.com> | 2013-11-26 14:59:21 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-12-16 14:37:42 +0100 |
| commit | 47d30674d6c79197fa7bfb0d09d5857f61e0277b (patch) | |
| tree | 97e100ae386becbf98bdf892ca1cc137ea90f634 /Documentation/spinlocks.txt | |
| parent | 175746eb06a8925274558793814d8c802dc48276 (diff) | |
| download | op-kernel-dev-47d30674d6c79197fa7bfb0d09d5857f61e0277b.zip op-kernel-dev-47d30674d6c79197fa7bfb0d09d5857f61e0277b.tar.gz | |
s390/css: Prevent unnecessary allocation in subchannel loop
Subchannel looping function for_each_subchannel_staged() allocates a
subchannel-ID-bitmap to efficiently iterate over the list of known
and unknown subchannels. Since this function is also used to iterate
over known-subchannels only, optimize that case by not requiring the
ID-bitmap allocation and falling back to simple bus_for_each_dev()
looping.
Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'Documentation/spinlocks.txt')
0 files changed, 0 insertions, 0 deletions
