On 05/12/2015 02:25 AM, Nicholas A. Bellinger wrote:
From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx> This patch converts fabric independent configfs link/unlink to use RCU read path macros for se_node_acl->lun_entry_hlist access. It also converts SCSI MIB configfs show attribute code to use RCU read path macros for se_node_acl->lun_entry_hlist access. Cc: Hannes Reinecke <hare@xxxxxxx> Cc: Christoph Hellwig <hch@xxxxxx> Cc: Sagi Grimberg <sagig@xxxxxxxxxxxx> Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx> --- drivers/target/target_core_fabric_configfs.c | 35 +++--- drivers/target/target_core_stat.c | 180 +++++++++++++-------------- 2 files changed, 110 insertions(+), 105 deletions(-) diff --git a/drivers/target/target_core_fabric_configfs.c b/drivers/target/target_core_fabric_configfs.c index 6cb4828..0dab6d5 100644 --- a/drivers/target/target_core_fabric_configfs.c +++ b/drivers/target/target_core_fabric_configfs.c @@ -123,16 +123,16 @@ static int target_fabric_mappedlun_link( * which be will write protected (READ-ONLY) when * tpg_1/attrib/demo_mode_write_protect=1 */ - spin_lock_irq(&lacl->se_lun_nacl->device_list_lock); - deve = lacl->se_lun_nacl->device_list[lacl->mapped_lun]; - if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) + rcu_read_lock(); + deve = target_nacl_find_deve(lacl->se_lun_nacl, lacl->mapped_lun); + if (deve && deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)
Why do we still need TRANSPORT_LUNFLAGS_INITIATOR_ACCESS? Isn't deve being not-NULL enough?
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