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[SCSI] zfcp: Remove global config_mutex

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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>
This commit is contained in:
Swen Schillig
2009-11-24 16:54:00 +01:00
committed by James Bottomley
parent f3450c7b91
commit de3dc57214
7 changed files with 230 additions and 156 deletions
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5
drivers/s390/scsi/zfcp_ext.h
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@@ -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;