[PATCH-v3 2/4] target: Drop lun_sep_lock for se_lun->lun_se_dev RCU usage

From: Nicholas Bellinger With se_port and t10_alua_tg_pt_gp_member being absored into se_lun, there is no need for an extra lock to protect se_lun->lun_se_dev assignment. This patch also converts backend drivers to use call_rcu() release to allow any se_device readers to complete. The

[PATCH-v3 2/4] target: Drop lun_sep_lock for se_lun-lun_se_dev RCU usage

From: Nicholas Bellinger n...@linux-iscsi.org With se_port and t10_alua_tg_pt_gp_member being absored into se_lun, there is no need for an extra lock to protect se_lun-lun_se_dev assignment. This patch also converts backend drivers to use call_rcu() release to allow any se_device readers to