[SCSI] zfcp: Replace local reference counting with common kref
Replace the local reference counting by already available mechanisms
offered by kref. Where possible existing device structures were used,
including the same functionality.
Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index e45a08d..55dc402 100644
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -446,9 +446,7 @@
};
struct zfcp_adapter {
- atomic_t refcount; /* reference count */
- wait_queue_head_t remove_wq; /* can be used to wait for
- refcount drop to zero */
+ struct kref ref;
u64 peer_wwnn; /* P2P peer WWNN */
u64 peer_wwpn; /* P2P peer WWPN */
u32 peer_d_id; /* P2P peer D_ID */
@@ -501,9 +499,6 @@
struct device sysfs_device; /* sysfs device */
struct fc_rport *rport; /* rport of fc transport class */
struct list_head list; /* list of remote ports */
- atomic_t refcount; /* reference count */
- wait_queue_head_t remove_wq; /* can be used to wait for
- refcount drop to zero */
struct zfcp_adapter *adapter; /* adapter used to access port */
struct list_head unit_list; /* head of logical unit list */
rwlock_t unit_list_lock; /* unit list lock */
@@ -525,9 +520,6 @@
struct zfcp_unit {
struct device sysfs_device; /* sysfs device */
struct list_head list; /* list of logical units */
- atomic_t refcount; /* reference count */
- wait_queue_head_t remove_wq; /* can be used to wait for
- refcount drop to zero */
struct zfcp_port *port; /* remote port of unit */
atomic_t status; /* status of this logical unit */
u64 fcp_lun; /* own FCP_LUN */
@@ -656,47 +648,4 @@
return NULL;
}
-/*
- * functions needed for reference/usage counting
- */
-
-static inline void
-zfcp_unit_get(struct zfcp_unit *unit)
-{
- atomic_inc(&unit->refcount);
-}
-
-static inline void
-zfcp_unit_put(struct zfcp_unit *unit)
-{
- if (atomic_dec_return(&unit->refcount) == 0)
- wake_up(&unit->remove_wq);
-}
-
-static inline void
-zfcp_port_get(struct zfcp_port *port)
-{
- atomic_inc(&port->refcount);
-}
-
-static inline void
-zfcp_port_put(struct zfcp_port *port)
-{
- if (atomic_dec_return(&port->refcount) == 0)
- wake_up(&port->remove_wq);
-}
-
-static inline void
-zfcp_adapter_get(struct zfcp_adapter *adapter)
-{
- atomic_inc(&adapter->refcount);
-}
-
-static inline void
-zfcp_adapter_put(struct zfcp_adapter *adapter)
-{
- if (atomic_dec_return(&adapter->refcount) == 0)
- wake_up(&adapter->remove_wq);
-}
-
#endif /* ZFCP_DEF_H */