io-wq: re-add io_wq_current_is_worker()

This reverts commit 8cdda87a4414, we now have several use csaes for this
helper. Reinstate it.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/fs/io-wq.h b/fs/io-wq.h
index fb993b2bd0ef019e76438bc5483b2995ba49fc8a..3f5e356de98050f67503336cfac1db64f455230d 100644 (file)
--- a/fs/io-wq.h
+++ b/fs/io-wq.h
@@ -120,6 +120,10 @@ static inline void io_wq_worker_sleeping(struct task_struct *tsk)
 static inline void io_wq_worker_running(struct task_struct *tsk)
 {
 }
-#endif /* CONFIG_IO_WQ */
+#endif
 
-#endif /* INTERNAL_IO_WQ_H */
+static inline bool io_wq_current_is_worker(void)
+{
+       return in_task() && (current->flags & PF_IO_WORKER);
+}
+#endif