io_uring/cmd: inline io_uring_cmd_get_task

With io_uring_types.h we see all required definitions to inline
io_uring_cmd_get_task().
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/aa8e317f09e651a5f3e72f8c0ad3902084c1f930.1701391955.git.asml.silence@gmail.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

include/linux/io_uring/cmd.h

@@ -39,7 +39,6 @@ void __io_uring_cmd_do_in_task(struct io_uring_cmd *ioucmd,
 
 void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd,
 		unsigned int issue_flags);
-struct task_struct *io_uring_cmd_get_task(struct io_uring_cmd *cmd);
 
 #else
 static inline int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
@@ -60,10 +59,6 @@ static inline void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd,
 		unsigned int issue_flags)
 {
 }
-static inline struct task_struct *io_uring_cmd_get_task(struct io_uring_cmd *cmd)
-{
-	return NULL;
-}
 #endif
 
 /* users must follow the IOU_F_TWQ_LAZY_WAKE semantics */
@@ -79,4 +74,9 @@ static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
 	__io_uring_cmd_do_in_task(ioucmd, task_work_cb, 0);
 }
 
+static inline struct task_struct *io_uring_cmd_get_task(struct io_uring_cmd *cmd)
+{
+	return cmd_to_io_kiocb(cmd)->task;
+}
+
 #endif /* _LINUX_IO_URING_CMD_H */

io_uring/uring_cmd.c

@@ -52,12 +52,6 @@ void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd,
 }
 EXPORT_SYMBOL_GPL(io_uring_cmd_mark_cancelable);
 
-struct task_struct *io_uring_cmd_get_task(struct io_uring_cmd *cmd)
-{
-	return cmd_to_io_kiocb(cmd)->task;
-}
-EXPORT_SYMBOL_GPL(io_uring_cmd_get_task);
-
 static void io_uring_cmd_work(struct io_kiocb *req, struct io_tw_state *ts)
 {
 	struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req, struct io_uring_cmd);