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target: make the se_task task_state_active a normal bool

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There is no need to make task_state_active an atomic_t given that it is
always set under the execute_task_lock so we can make it a simple bool.
Also rename it to t_state_active to be closer to the list it guards,
and make sure all checks before the list addion/removal actually happen
under execute_task_lock.

Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Nicholas Bellinger <[email protected]>
This commit is contained in:
Christoph Hellwig 2011-11-23 06:54:36 -05:00 • committed by Nicholas Bellinger
commit 1880807adb
3 changed files with 22 additions and 23 deletions
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2
drivers/target/target_core_tmr.c
View file

@ -221,7 +221,7 @@ static void core_tmr_drain_task_list(
continue;
list_move_tail(&task->t_state_list, &drain_task_list);
atomic_set(&task->task_state_active, 0);
task->t_state_active = false;
/*
* Remove from task execute list before processing drain_task_list
*/

39
drivers/target/target_core_transport.c
View file

@ -421,18 +421,18 @@ static void transport_all_task_dev_remove_state(struct se_cmd *cmd)
if (task->task_flags & TF_ACTIVE)
continue;
if (!atomic_read(&task->task_state_active))
continue;
spin_lock_irqsave(&dev->execute_task_lock, flags);
list_del(&task->t_state_list);
pr_debug("Removed ITT: 0x%08x dev: %p task[%p]\n",
cmd->se_tfo->get_task_tag(cmd), dev, task);
spin_unlock_irqrestore(&dev->execute_task_lock, flags);
if (task->t_state_active) {
pr_debug("Removed ITT: 0x%08x dev: %p task[%p]\n",
cmd->se_tfo->get_task_tag(cmd), dev, task);
atomic_set(&task->task_state_active, 0);
atomic_dec(&cmd->t_task_cdbs_ex_left);
list_del(&task->t_state_list);
atomic_dec(&cmd->t_task_cdbs_ex_left);
task->t_state_active = false;
}
spin_unlock_irqrestore(&dev->execute_task_lock, flags);
}
}
/* transport_cmd_check_stop():
@ -813,7 +813,7 @@ static void __transport_add_task_to_execute_queue(
head_of_queue = transport_add_task_check_sam_attr(task, task_prev, dev);
atomic_inc(&dev->execute_tasks);
if (atomic_read(&task->task_state_active))
if (task->t_state_active)
return;
/*
* Determine if this task needs to go to HEAD_OF_QUEUE for the
@ -827,7 +827,7 @@ static void __transport_add_task_to_execute_queue(
else
list_add_tail(&task->t_state_list, &dev->state_task_list);
atomic_set(&task->task_state_active, 1);
task->t_state_active = true;
pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n",
task->task_se_cmd->se_tfo->get_task_tag(task->task_se_cmd),
@ -842,17 +842,16 @@ static void transport_add_tasks_to_state_queue(struct se_cmd *cmd)
spin_lock_irqsave(&cmd->t_state_lock, flags);
list_for_each_entry(task, &cmd->t_task_list, t_list) {
if (atomic_read(&task->task_state_active))
continue;
spin_lock(&dev->execute_task_lock);
list_add_tail(&task->t_state_list, &dev->state_task_list);
atomic_set(&task->task_state_active, 1);
pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n",
task->task_se_cmd->se_tfo->get_task_tag(
task->task_se_cmd), task, dev);
if (!task->t_state_active) {
list_add_tail(&task->t_state_list,
&dev->state_task_list);
task->t_state_active = true;
pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n",
task->task_se_cmd->se_tfo->get_task_tag(
task->task_se_cmd), task, dev);
}
spin_unlock(&dev->execute_task_lock);
}
spin_unlock_irqrestore(&cmd->t_state_lock, flags);