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scsi: target: Remove se_dev_entry.ua_count

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se_dev_entry.ua_count is only used to check whether or not
se_dev_entry.ua_list is empty. Use list_empty_careful() instead.  Checking
whether or not ua_list is empty without holding the lock that protects that
list is fine because the code that dequeues from that list will check again
whether or not that list is empty.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Mike Christie <mchristi@redhat.com>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Bart Van Assche
2018-06-22 14:53:07 -07:00
committed by Martin K. Petersen
parent 325c1e8b24
commit e936a38ac9
3 changed files with 2 additions and 12 deletions
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1
include/target/target_core_base.h
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@@ -638,7 +638,6 @@ struct se_dev_entry {
atomic_long_t total_cmds;
atomic_long_t read_bytes;
atomic_long_t write_bytes;
atomic_t ua_count;
/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
struct kref pr_kref;
struct completion pr_comp;