staging: iio: iio_sw_ring_helper_state - add dummy case for no buffer builds.

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/staging/iio/ring_sw.h b/drivers/staging/iio/ring_sw.h
index 0194e7fb65ca..7c27e2c70f77 100644
--- a/drivers/staging/iio/ring_sw.h
+++ b/drivers/staging/iio/ring_sw.h
@@ -222,5 +222,8 @@ void iio_sw_trigger_bh_to_ring(struct work_struct *work_s);
 #else /* CONFIG_IIO_RING_BUFFER*/
 static inline void iio_ring_sw_register_funcs(struct iio_ring_access_funcs *ra)
 {};
+struct iio_sw_ring_helper_state {
+        struct iio_dev                  *indio_dev;
+};
 #endif /* !CONFIG_IIO_RING_BUFFER */
 #endif /* _IIO_RING_SW_H_ */