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| author | Swen Schillig <swen@vnet.ibm.com> | 2009-11-24 16:53:58 +0100 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2009-12-04 12:02:01 -0600 |
| commit | ecf0c7721b104c0ce9c8ca534c911f6310cf92a8 (patch) | |
| tree | 639032b36bcbbe905c98c6f0b3b521dc2f0b1806 /drivers/s390/scsi/zfcp_def.h | |
| parent | 0a55256d158c18e4821c248a295b7f8f4423660f (diff) | |
| download | linux-ecf0c7721b104c0ce9c8ca534c911f6310cf92a8.tar.gz linux-ecf0c7721b104c0ce9c8ca534c911f6310cf92a8.tar.bz2 linux-ecf0c7721b104c0ce9c8ca534c911f6310cf92a8.zip | |
[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.h | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index 7da2fad8f515..e45a08d6c98e 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; |