diff options
Diffstat (limited to 'drivers/s390/cio/chp.h')
| -rw-r--r-- | drivers/s390/cio/chp.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/s390/cio/chp.h b/drivers/s390/cio/chp.h index 26c3d224617..12b4903d6fe 100644 --- a/drivers/s390/cio/chp.h +++ b/drivers/s390/cio/chp.h @@ -1,7 +1,7 @@ /* * drivers/s390/cio/chp.h * - * Copyright IBM Corp. 2007 + * Copyright IBM Corp. 2007,2010 * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com> */ @@ -10,6 +10,7 @@ #include <linux/types.h> #include <linux/device.h> +#include <linux/mutex.h> #include <asm/chpid.h> #include "chsc.h" #include "css.h" @@ -40,16 +41,23 @@ static inline int chp_test_bit(u8 *bitmap, int num) struct channel_path { + struct device dev; struct chp_id chpid; + struct mutex lock; /* Serialize access to below members. */ int state; struct channel_path_desc desc; /* Channel-measurement related stuff: */ int cmg; int shared; void *cmg_chars; - struct device dev; }; +/* Return channel_path struct for given chpid. */ +static inline struct channel_path *chpid_to_chp(struct chp_id chpid) +{ + return channel_subsystems[chpid.cssid]->chps[chpid.id]; +} + int chp_get_status(struct chp_id chpid); u8 chp_get_sch_opm(struct subchannel *sch); int chp_is_registered(struct chp_id chpid); |