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audit: cleanup prune_tree_thread

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We can use kthread_run instead of kthread_create+wake_up_process for
creating the thread.

We do not need to set the task state to TASK_RUNNING after schedule(),
the process is in that state already.

And we do not need to set the state to TASK_INTERRUPTIBLE when not
doing schedule() as we set the state to TASK_RUNNING immediately
afterwards.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Paul Moore <paul@paul-moore.com>
Cc: Eric Paris <eparis@redhat.com>
Cc: <linux-audit@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Jiri Slaby 2016-03-31 10:49:28 +02:00 committed by Paul Moore
parent b562e44f50
commit 0bf676d1fd
1 changed files with 5 additions and 7 deletions
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12
kernel/audit_tree.c
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@ -661,10 +661,10 @@ static int tag_mount(struct vfsmount *mnt, void *arg)
static int prune_tree_thread(void *unused)
{
for (;;) {
set_current_state(TASK_INTERRUPTIBLE);
if (list_empty(&prune_list))
if (list_empty(&prune_list)) {
set_current_state(TASK_INTERRUPTIBLE);
schedule();
__set_current_state(TASK_RUNNING);
}
mutex_lock(&audit_cmd_mutex);
mutex_lock(&audit_filter_mutex);
@ -693,16 +693,14 @@ static int audit_launch_prune(void)
{
if (prune_thread)
return 0;
prune_thread = kthread_create(prune_tree_thread, NULL,
prune_thread = kthread_run(prune_tree_thread, NULL,
"audit_prune_tree");
if (IS_ERR(prune_thread)) {
pr_err("cannot start thread audit_prune_tree");
prune_thread = NULL;
return -ENOMEM;
} else {
wake_up_process(prune_thread);
return 0;
}
return 0;
}
/* called with audit_filter_mutex */