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scsi: target/core: Simplify transport_clear_lun_ref()

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Since transport_clear_lun_ref() already waits until the percpu-refcount
.release() method is called, it is not necessary to wait first until
percpu_ref_kill_and_confirm() has finished transitioning the refcount into
atomic mode. Remove the code that waits for percpu_ref_kill_and_confirm()
to complete and also the completion object that is used by that code.  This
patch does not change the behavior of the SCSI target code.

Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: David Disseldorp <ddiss@suse.de>
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Bart Van Assche 2018-11-27 15:51:57 -08:00 • committed by Martin K. Petersen
parent 5d6cd9fe31
commit a95be3842c
4 changed files with 5 additions and 33 deletions
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1
include/target/target_core_base.h
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@ -733,7 +733,6 @@ struct se_lun {
struct scsi_port_stats lun_stats;
struct config_group lun_group;
struct se_port_stat_grps port_stat_grps;
struct completion lun_ref_comp;
struct completion lun_shutdown_comp;
struct percpu_ref lun_ref;
struct list_head lun_dev_link;