[SCSI] zfcp: Remove global config_mutex

The global config_mutex was required for the serialization of a
configuration change within the zfcp driver.  This global locking is
now obsolete and can be removed.  The requirement of serializing the
access to a zfcp_adapter reference via a ccw_device is realized wth a
static spinlock.

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>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h
index 3106c3be6395..1e3ec708505b 100644
--- a/drivers/s390/scsi/zfcp_ext.h
+++ b/drivers/s390/scsi/zfcp_ext.h
@@ -14,7 +14,7 @@
 /* zfcp_aux.c */
 extern struct zfcp_unit *zfcp_get_unit_by_lun(struct zfcp_port *, u64);
 extern struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *, u64);
-extern int zfcp_adapter_enqueue(struct ccw_device *);
+extern struct zfcp_adapter *zfcp_adapter_enqueue(struct ccw_device *);
 extern struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *, u64, u32,
                                            u32);
 extern struct zfcp_unit *zfcp_unit_enqueue(struct zfcp_port *, u64);
@@ -24,11 +24,14 @@ extern int zfcp_sg_setup_table(struct scatterlist *, int);
 extern void zfcp_device_unregister(struct device *,
                                    const struct attribute_group *);
 extern void zfcp_adapter_release(struct kref *);
+extern void zfcp_adapter_unregister(struct zfcp_adapter *);
 
 /* zfcp_ccw.c */
 extern int zfcp_ccw_register(void);
 extern int zfcp_ccw_priv_sch(struct zfcp_adapter *);
 extern struct ccw_driver zfcp_ccw_driver;
+extern struct zfcp_adapter *zfcp_ccw_adapter_by_cdev(struct ccw_device *);
+extern void zfcp_ccw_adapter_put(struct zfcp_adapter *);
 
 /* zfcp_cfdc.c */
 extern struct miscdevice zfcp_cfdc_misc;