diff options
| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2016-11-08 16:28:03 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-01-16 09:27:52 +0300 |
| commit | 98cc43ab6bc9574ec4dbc61acccfdcbbfa34d4c5 (patch) | |
| tree | 044e735a994ac3464d1508f1e507bfcc4e52b693 /drivers/s390/cio/css.h | |
| parent | 57c52ae75774c717eb7cd777b5438244ae6b380c (diff) | |
| download | linux-98cc43ab6bc9574ec4dbc61acccfdcbbfa34d4c5.tar.xz | |
s390/cio: clarify cssid usage
Currently the cssid in various structures is used as the id of
the respective channel subsystem. Sometimes however we call the
index in the channel_subsystems array cssid. In some places the
id is even used as the index.
Provide a new define MAX_CSS_IDX and use it where appropriate.
In addition to that provide a dummy function to find a channel
subsystem by its id and a macro to iterate over the channel
subsystems.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.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 | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h index 2c9107e20251..cd19c08b93b2 100644 --- a/drivers/s390/cio/css.h +++ b/drivers/s390/cio/css.h @@ -130,6 +130,16 @@ struct channel_subsystem { extern struct channel_subsystem *channel_subsystems[]; +/* Dummy helper which needs to change once we support more than one css. */ +static inline struct channel_subsystem *css_by_id(u8 cssid) +{ + return channel_subsystems[0]; +} + +/* Dummy iterator which needs to change once we support more than one css. */ +#define for_each_css(css) \ + for ((css) = channel_subsystems[0]; (css); (css) = NULL) + /* Helper functions to build lists for the slow path. */ void css_schedule_eval(struct subchannel_id schid); void css_schedule_eval_all(void); |