[SCSI] sg: no need sg_open_exclusive_lock
Open exclusive check is protected by o_sem, no need sg_open_exclusive_lock. @exclude is used to record which type of rwsem we are holding. Signed-off-by:Vaughan Cao <vaughan.cao@oracle.com> Acked-by:
Douglas Gilbert <dgilbert@interlog.com> Signed-off-by:
James Bottomley <JBottomley@Parallels.com>
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