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| author | Sebastian Ott <sebott@linux.ibm.com> | 2018-06-26 15:09:32 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-07-17 07:27:55 +0200 |
| commit | d4f5d79e97ca6e903700d3d9455afb5694cc4833 (patch) | |
| tree | 13104c4b30fa7e9360f366c4e526640627705652 /drivers/s390/cio/css.h | |
| parent | 05b217f4c5573f34f6799698f7d4162c702132bc (diff) | |
| download | linux-stable-d4f5d79e97ca6e903700d3d9455afb5694cc4833.tar.gz linux-stable-d4f5d79e97ca6e903700d3d9455afb5694cc4833.tar.bz2 linux-stable-d4f5d79e97ca6e903700d3d9455afb5694cc4833.zip | |
s390/css: reduce stsch calls
Both css_evaluate_new_subchannel and cio_validate_subchannel used
stsch and css_sch_is_valid to check for a valid device.
Reduce stsch calls during subchannel evaluation by re-using schib
data. Also the type/devno valid information is only checked once.
Signed-off-by: Sebastian Ott <sebott@linux.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/css.h')
| -rw-r--r-- | drivers/s390/cio/css.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h index 30357cbf350a..8d832900a63d 100644 --- a/drivers/s390/cio/css.h +++ b/drivers/s390/cio/css.h @@ -103,7 +103,8 @@ extern void css_driver_unregister(struct css_driver *); extern void css_sch_device_unregister(struct subchannel *); extern int css_register_subchannel(struct subchannel *); -extern struct subchannel *css_alloc_subchannel(struct subchannel_id); +extern struct subchannel *css_alloc_subchannel(struct subchannel_id, + struct schib *schib); extern struct subchannel *get_subchannel_by_schid(struct subchannel_id); extern int css_init_done; extern int max_ssid; |