io_uring: dedup io_run_task_work

We have an identical copy of io_run_task_work() for io-wq called
io_flush_signals(), deduplicate them.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/a157a4df5fa217b8bd03c73494f2fd0e24e44fbc.1655802465.git.asml.silence@gmail.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

io_uring/filetable.h

@@ -2,6 +2,8 @@
 #ifndef IOU_FILE_TABLE_H
 #define IOU_FILE_TABLE_H
 
+#include <linux/file.h>
+
 struct io_ring_ctx;
 struct io_kiocb;
 

io_uring/io-wq.c

@@ -19,6 +19,7 @@
 
 #include "io-wq.h"
 #include "slist.h"
+#include "io_uring.h"
 
 #define WORKER_IDLE_TIMEOUT	(5 * HZ)
 
@@ -519,23 +520,11 @@ static struct io_wq_work *io_get_next_work(struct io_wqe_acct *acct,
 	return NULL;
 }
 
-static bool io_flush_signals(void)
-{
-	if (unlikely(test_thread_flag(TIF_NOTIFY_SIGNAL))) {
-		__set_current_state(TASK_RUNNING);
-		clear_notify_signal();
-		if (task_work_pending(current))
-			task_work_run();
-		return true;
-	}
-	return false;
-}
-
 static void io_assign_current_work(struct io_worker *worker,
 				   struct io_wq_work *work)
 {
 	if (work) {
-		io_flush_signals();
+		io_run_task_work();
 		cond_resched();
 	}
 
@@ -655,7 +644,7 @@ static int io_wqe_worker(void *data)
 		last_timeout = false;
 		__io_worker_idle(wqe, worker);
 		raw_spin_unlock(&wqe->lock);
-		if (io_flush_signals())
+		if (io_run_task_work())
 			continue;
 		ret = schedule_timeout(WORKER_IDLE_TIMEOUT);
 		if (signal_pending(current)) {