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-rw-r--r--kernel/workqueue.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index b052e2c4c710..e9e464a90376 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -27,6 +27,7 @@
#include <linux/cpu.h>
#include <linux/notifier.h>
#include <linux/kthread.h>
+#include <linux/hardirq.h>
/*
* The per-CPU workqueue (if single thread, we always use the first
@@ -476,6 +477,34 @@ void cancel_rearming_delayed_work(struct work_struct *work)
}
EXPORT_SYMBOL(cancel_rearming_delayed_work);
+/**
+ * execute_in_process_context - reliably execute the routine with user context
+ * @fn: the function to execute
+ * @data: data to pass to the function
+ * @ew: guaranteed storage for the execute work structure (must
+ * be available when the work executes)
+ *
+ * Executes the function immediately if process context is available,
+ * otherwise schedules the function for delayed execution.
+ *
+ * Returns: 0 - function was executed
+ * 1 - function was scheduled for execution
+ */
+int execute_in_process_context(void (*fn)(void *data), void *data,
+ struct execute_work *ew)
+{
+ if (!in_interrupt()) {
+ fn(data);
+ return 0;
+ }
+
+ INIT_WORK(&ew->work, fn, data);
+ schedule_work(&ew->work);
+
+ return 1;
+}
+EXPORT_SYMBOL_GPL(execute_in_process_context);
+
int keventd_up(void)
{
return keventd_wq != NULL;