From 525b305d61ede489ce2118b000a5dabd6d869dac Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Tue, 17 Dec 2019 14:13:37 -0700
Subject: [PATCH] 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>
---
 fs/io-wq.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/fs/io-wq.h b/fs/io-wq.h
index fb993b2bd0ef..3f5e356de980 100644
--- 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