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authorSwen Schillig <swen@vnet.ibm.com>2009-11-24 16:53:58 +0100
committerJames Bottomley <James.Bottomley@suse.de>2009-12-04 12:02:01 -0600
commitecf0c7721b104c0ce9c8ca534c911f6310cf92a8 (patch)
tree639032b36bcbbe905c98c6f0b3b521dc2f0b1806 /drivers/s390/scsi/zfcp_def.h
parent0a55256d158c18e4821c248a295b7f8f4423660f (diff)
downloadop-kernel-dev-ecf0c7721b104c0ce9c8ca534c911f6310cf92a8.zip
op-kernel-dev-ecf0c7721b104c0ce9c8ca534c911f6310cf92a8.tar.gz
[SCSI] zfcp: Replace global config_lock with local list locks
The global config_lock was used to protect the configuration organized in independent lists. It is not necessary to have a lock on driver level for this purpose. This patch replaces the global config_lock with a set of local list locks. 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>
Diffstat (limited to 'drivers/s390/scsi/zfcp_def.h')
-rw-r--r--drivers/s390/scsi/zfcp_def.h9
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index 7da2fad..e45a08d 100644
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -461,7 +461,8 @@ struct zfcp_adapter {
u32 hardware_version; /* of FCP channel */
u16 timer_ticks; /* time int for a tick */
struct Scsi_Host *scsi_host; /* Pointer to mid-layer */
- struct list_head port_list_head; /* remote port list */
+ struct list_head port_list; /* remote port list */
+ rwlock_t port_list_lock; /* port list lock */
unsigned long req_no; /* unique FSF req number */
struct list_head *req_list; /* list of pending reqs */
spinlock_t req_list_lock; /* request list lock */
@@ -504,7 +505,8 @@ struct zfcp_port {
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; /* head of logical unit list */
+ struct list_head unit_list; /* head of logical unit list */
+ rwlock_t unit_list_lock; /* unit list lock */
atomic_t status; /* status of this remote port */
u64 wwnn; /* WWNN if known */
u64 wwpn; /* WWPN */
@@ -601,9 +603,6 @@ struct zfcp_fsf_req {
struct zfcp_data {
struct scsi_host_template scsi_host_template;
struct scsi_transport_template *scsi_transport_template;
- rwlock_t config_lock; /* serialises changes
- to adapter/port/unit
- lists */
struct mutex config_mutex;
struct kmem_cache *gpn_ft_cache;
struct kmem_cache *qtcb_cache;
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