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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-02-11 09:09:02 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-02-11 09:09:02 +0100
commit9481caf39bf55a862067007ffc53621b4305a387 (patch)
treeed7d011557a7edd33839d4e0e2eeb57e901afcbe /kernel/workqueue.c
parent344c0152d878922365464b7140c74c2a5e073d99 (diff)
parentd13937116f1e82bf508a6325111b322c30c85eb9 (diff)
downloadlinux-9481caf39bf55a862067007ffc53621b4305a387.tar.bz2
Merge 5.0-rc6 into driver-core-next
We need the debugfs fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/workqueue.c')
-rw-r--r--kernel/workqueue.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index d5a26e456f7a..1ce2697254d1 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -910,6 +910,26 @@ struct task_struct *wq_worker_sleeping(struct task_struct *task)
}
/**
+ * wq_worker_last_func - retrieve worker's last work function
+ *
+ * Determine the last function a worker executed. This is called from
+ * the scheduler to get a worker's last known identity.
+ *
+ * CONTEXT:
+ * spin_lock_irq(rq->lock)
+ *
+ * Return:
+ * The last work function %current executed as a worker, NULL if it
+ * hasn't executed any work yet.
+ */
+work_func_t wq_worker_last_func(struct task_struct *task)
+{
+ struct worker *worker = kthread_data(task);
+
+ return worker->last_func;
+}
+
+/**
* worker_set_flags - set worker flags and adjust nr_running accordingly
* @worker: self
* @flags: flags to set
@@ -2268,6 +2288,9 @@ __acquires(&pool->lock)
if (unlikely(cpu_intensive))
worker_clr_flags(worker, WORKER_CPU_INTENSIVE);
+ /* tag the worker for identification in schedule() */
+ worker->last_func = worker->current_func;
+
/* we're done with it, release */
hash_del(&worker->hentry);
worker->current_work = NULL;