staging: iio: Add stubs for iio_ring_buffer_[un]register and equivalent driver stubs

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Barry Song <21cnbao@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/accel/adis16209.h

@@ -147,8 +147,6 @@ ssize_t adis16209_read_data_from_ring(struct device *dev,
 int adis16209_configure_ring(struct iio_dev *indio_dev);
 void adis16209_unconfigure_ring(struct iio_dev *indio_dev);
 
-int adis16209_initialize_ring(struct iio_ring_buffer *ring);
-void adis16209_uninitialize_ring(struct iio_ring_buffer *ring);
 #else /* CONFIG_IIO_RING_BUFFER */
 
 static inline void adis16209_remove_trigger(struct iio_dev *indio_dev)
@@ -177,14 +175,5 @@ static inline void adis16209_unconfigure_ring(struct iio_dev *indio_dev)
 {
 }
 
-static inline int adis16209_initialize_ring(struct iio_ring_buffer *ring)
-{
-	return 0;
-}
-
-static inline void adis16209_uninitialize_ring(struct iio_ring_buffer *ring)
-{
-}
-
 #endif /* CONFIG_IIO_RING_BUFFER */
 #endif /* SPI_ADIS16209_H_ */

drivers/staging/iio/accel/adis16209_core.c

@@ -20,6 +20,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
+#include "../ring_generic.h"
 #include "accel.h"
 #include "inclinometer.h"
 #include "../gyro/gyro.h"
@@ -520,7 +521,7 @@ static int __devinit adis16209_probe(struct spi_device *spi)
 		goto error_unreg_ring_funcs;
 	regdone = 1;
 
-	ret = adis16209_initialize_ring(st->indio_dev->ring);
+	ret = iio_ring_buffer_register(st->indio_dev->ring, 0);
 	if (ret) {
 		printk(KERN_ERR "failed to initialize the ring\n");
 		goto error_unreg_ring_funcs;
@@ -552,7 +553,7 @@ error_unregister_line:
 	if (spi->irq)
 		iio_unregister_interrupt_line(st->indio_dev, 0);
 error_uninitialize_ring:
-	adis16209_uninitialize_ring(st->indio_dev->ring);
+	iio_ring_buffer_unregister(st->indio_dev->ring);
 error_unreg_ring_funcs:
 	adis16209_unconfigure_ring(st->indio_dev);
 error_free_dev:
@@ -581,7 +582,7 @@ static int adis16209_remove(struct spi_device *spi)
 	if (spi->irq)
 		iio_unregister_interrupt_line(indio_dev, 0);
 
-	adis16209_uninitialize_ring(indio_dev->ring);
+	iio_ring_buffer_unregister(indio_dev->ring);
 	iio_device_unregister(indio_dev);
 	adis16209_unconfigure_ring(indio_dev);
 	kfree(st->tx);

drivers/staging/iio/accel/adis16209_ring.c

@@ -225,13 +225,3 @@ error_iio_sw_rb_free:
 	iio_sw_rb_free(indio_dev->ring);
 	return ret;
 }
-
-int adis16209_initialize_ring(struct iio_ring_buffer *ring)
-{
-	return iio_ring_buffer_register(ring, 0);
-}
-
-void adis16209_uninitialize_ring(struct iio_ring_buffer *ring)
-{
-	iio_ring_buffer_unregister(ring);
-}

drivers/staging/iio/accel/adis16240.h

@@ -173,8 +173,6 @@ ssize_t adis16240_read_data_from_ring(struct device *dev,
 int adis16240_configure_ring(struct iio_dev *indio_dev);
 void adis16240_unconfigure_ring(struct iio_dev *indio_dev);
 
-int adis16240_initialize_ring(struct iio_ring_buffer *ring);
-void adis16240_uninitialize_ring(struct iio_ring_buffer *ring);
 #else /* CONFIG_IIO_RING_BUFFER */
 
 static inline void adis16240_remove_trigger(struct iio_dev *indio_dev)
@@ -203,14 +201,5 @@ static inline void adis16240_unconfigure_ring(struct iio_dev *indio_dev)
 {
 }
 
-static inline int adis16240_initialize_ring(struct iio_ring_buffer *ring)
-{
-	return 0;
-}
-
-static inline void adis16240_uninitialize_ring(struct iio_ring_buffer *ring)
-{
-}
-
 #endif /* CONFIG_IIO_RING_BUFFER */
 #endif /* SPI_ADIS16240_H_ */

drivers/staging/iio/accel/adis16240_core.c

@@ -20,6 +20,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
+#include "../ring_generic.h"
 #include "accel.h"
 #include "../adc/adc.h"
 
@@ -502,7 +503,7 @@ static int __devinit adis16240_probe(struct spi_device *spi)
 		goto error_unreg_ring_funcs;
 	regdone = 1;
 
-	ret = adis16240_initialize_ring(st->indio_dev->ring);
+	ret = iio_ring_buffer_register(st->indio_dev->ring, 0);
 	if (ret) {
 		printk(KERN_ERR "failed to initialize the ring\n");
 		goto error_unreg_ring_funcs;
@@ -534,7 +535,7 @@ error_unregister_line:
 	if (spi->irq)
 		iio_unregister_interrupt_line(st->indio_dev, 0);
 error_uninitialize_ring:
-	adis16240_uninitialize_ring(st->indio_dev->ring);
+	iio_ring_buffer_unregister(st->indio_dev->ring);
 error_unreg_ring_funcs:
 	adis16240_unconfigure_ring(st->indio_dev);
 error_free_dev:
@@ -563,7 +564,7 @@ static int adis16240_remove(struct spi_device *spi)
 	if (spi->irq)
 		iio_unregister_interrupt_line(indio_dev, 0);
 
-	adis16240_uninitialize_ring(indio_dev->ring);
+	iio_ring_buffer_unregister(indio_dev->ring);
 	iio_device_unregister(indio_dev);
 	adis16240_unconfigure_ring(indio_dev);
 	kfree(st->tx);

drivers/staging/iio/accel/adis16240_ring.c

@@ -214,12 +214,3 @@ error_iio_sw_rb_free:
 	return ret;
 }
 
-int adis16240_initialize_ring(struct iio_ring_buffer *ring)
-{
-	return iio_ring_buffer_register(ring, 0);
-}
-
-void adis16240_uninitialize_ring(struct iio_ring_buffer *ring)
-{
-	iio_ring_buffer_unregister(ring);
-}

drivers/staging/iio/accel/lis3l02dq.h

@@ -195,8 +195,6 @@ ssize_t lis3l02dq_read_accel_from_ring(struct device *dev,
 int lis3l02dq_configure_ring(struct iio_dev *indio_dev);
 void lis3l02dq_unconfigure_ring(struct iio_dev *indio_dev);
 
-int lis3l02dq_initialize_ring(struct iio_ring_buffer *ring);
-void lis3l02dq_uninitialize_ring(struct iio_ring_buffer *ring);
 #else /* CONFIG_IIO_RING_BUFFER */
 
 static inline void lis3l02dq_remove_trigger(struct iio_dev *indio_dev)
@@ -222,12 +220,5 @@ static int lis3l02dq_configure_ring(struct iio_dev *indio_dev)
 static inline void lis3l02dq_unconfigure_ring(struct iio_dev *indio_dev)
 {
 }
-static inline int lis3l02dq_initialize_ring(struct iio_ring_buffer *ring)
-{
-	return 0;
-}
-static inline void lis3l02dq_uninitialize_ring(struct iio_ring_buffer *ring)
-{
-}
 #endif /* CONFIG_IIO_RING_BUFFER */
 #endif /* SPI_LIS3L02DQ_H_ */

drivers/staging/iio/accel/lis3l02dq_core.c

@@ -27,6 +27,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
+#include "../ring_generic.h"
 #include "accel.h"
 
 #include "lis3l02dq.h"
@@ -791,7 +792,7 @@ static int __devinit lis3l02dq_probe(struct spi_device *spi)
 		goto error_unreg_ring_funcs;
 	regdone = 1;
 
-	ret = lis3l02dq_initialize_ring(st->indio_dev->ring);
+	ret = iio_ring_buffer_register(st->indio_dev->ring, 0);
 	if (ret) {
 		printk(KERN_ERR "failed to initialize the ring\n");
 		goto error_unreg_ring_funcs;
@@ -825,7 +826,7 @@ error_unregister_line:
 	if (st->indio_dev->modes & INDIO_RING_TRIGGERED)
 		iio_unregister_interrupt_line(st->indio_dev, 0);
 error_uninitialize_ring:
-	lis3l02dq_uninitialize_ring(st->indio_dev->ring);
+	iio_ring_buffer_unregister(st->indio_dev->ring);
 error_unreg_ring_funcs:
 	lis3l02dq_unconfigure_ring(st->indio_dev);
 error_free_dev:
@@ -886,7 +887,7 @@ static int lis3l02dq_remove(struct spi_device *spi)
 	if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0)
 		iio_unregister_interrupt_line(indio_dev, 0);
 
-	lis3l02dq_uninitialize_ring(indio_dev->ring);
+	iio_ring_buffer_unregister(indio_dev->ring);
 	lis3l02dq_unconfigure_ring(indio_dev);
 	iio_device_unregister(indio_dev);
 	kfree(st->tx);

drivers/staging/iio/accel/lis3l02dq_ring.c

@@ -559,15 +559,5 @@ error_iio_sw_rb_free:
 	return ret;
 }
 
-int lis3l02dq_initialize_ring(struct iio_ring_buffer *ring)
-{
-	return iio_ring_buffer_register(ring, 0);
-}
-
-void lis3l02dq_uninitialize_ring(struct iio_ring_buffer *ring)
-{
-	iio_ring_buffer_unregister(ring);
-}
-
 
 

drivers/staging/iio/adc/max1363.h

@@ -230,26 +230,13 @@ int max1363_single_channel_from_ring(long mask, struct max1363_state *st);
 int max1363_register_ring_funcs_and_init(struct iio_dev *indio_dev);
 void max1363_ring_cleanup(struct iio_dev *indio_dev);
 
-int max1363_initialize_ring(struct iio_ring_buffer *ring);
-void max1363_uninitialize_ring(struct iio_ring_buffer *ring);
-
 #else /* CONFIG_MAX1363_RING_BUFFER */
 
-static inline void max1363_uninitialize_ring(struct iio_ring_buffer *ring)
-{
-}
-
-static inline int max1363_initialize_ring(struct iio_ring_buffer *ring)
-{
-	return 0;
-}
-
 int max1363_single_channel_from_ring(long mask, struct max1363_state *st)
 {
 	return -EINVAL;
 }
 
-
 static inline int
 max1363_register_ring_funcs_and_init(struct iio_dev *indio_dev)
 {

drivers/staging/iio/adc/max1363_core.c

@@ -1653,7 +1653,7 @@ static int __devinit max1363_probe(struct i2c_client *client,
 	if (ret)
 		goto error_cleanup_ring;
 	regdone = 1;
-	ret = max1363_initialize_ring(st->indio_dev->ring);
+	ret = iio_ring_buffer_register(st->indio_dev->ring, 0);
 	if (ret)
 		goto error_cleanup_ring;
 
@@ -1671,7 +1671,7 @@ static int __devinit max1363_probe(struct i2c_client *client,
 
 	return 0;
 error_uninit_ring:
-	max1363_uninitialize_ring(st->indio_dev->ring);
+	iio_ring_buffer_unregister(st->indio_dev->ring);
 error_cleanup_ring:
 	max1363_ring_cleanup(st->indio_dev);
 error_free_available_scan_masks:
@@ -1700,7 +1700,7 @@ static int max1363_remove(struct i2c_client *client)
 
 	if (st->chip_info->monitor_mode && client->irq)
 		iio_unregister_interrupt_line(st->indio_dev, 0);
-	max1363_uninitialize_ring(indio_dev->ring);
+	iio_ring_buffer_unregister(indio_dev->ring);
 	max1363_ring_cleanup(indio_dev);
 	kfree(st->indio_dev->available_scan_masks);
 	iio_device_unregister(indio_dev);

drivers/staging/iio/adc/max1363_ring.c

@@ -224,13 +224,3 @@ void max1363_ring_cleanup(struct iio_dev *indio_dev)
 	kfree(indio_dev->pollfunc);
 	iio_sw_rb_free(indio_dev->ring);
 }
-
-void max1363_uninitialize_ring(struct iio_ring_buffer *ring)
-{
-	iio_ring_buffer_unregister(ring);
-}
-
-int max1363_initialize_ring(struct iio_ring_buffer *ring)
-{
-	return iio_ring_buffer_register(ring, 0);
-}

drivers/staging/iio/gyro/adis16260.h

@@ -130,8 +130,6 @@ ssize_t adis16260_read_data_from_ring(struct device *dev,
 int adis16260_configure_ring(struct iio_dev *indio_dev);
 void adis16260_unconfigure_ring(struct iio_dev *indio_dev);
 
-int adis16260_initialize_ring(struct iio_ring_buffer *ring);
-void adis16260_uninitialize_ring(struct iio_ring_buffer *ring);
 #else /* CONFIG_IIO_RING_BUFFER */
 
 static inline void adis16260_remove_trigger(struct iio_dev *indio_dev)
@@ -160,14 +158,5 @@ static inline void adis16260_unconfigure_ring(struct iio_dev *indio_dev)
 {
 }
 
-static inline int adis16260_initialize_ring(struct iio_ring_buffer *ring)
-{
-	return 0;
-}
-
-static inline void adis16260_uninitialize_ring(struct iio_ring_buffer *ring)
-{
-}
-
 #endif /* CONFIG_IIO_RING_BUFFER */
 #endif /* SPI_ADIS16260_H_ */

drivers/staging/iio/gyro/adis16260_core.c

@@ -20,6 +20,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
+#include "../ring_generic.h"
 #include "../adc/adc.h"
 #include "gyro.h"
 
@@ -555,8 +556,7 @@ static int __devinit adis16260_probe(struct spi_device *spi)
 	if (ret)
 		goto error_unreg_ring_funcs;
 	regdone = 1;
-
-	ret = adis16260_initialize_ring(st->indio_dev->ring);
+	ret = iio_ring_buffer_register(st->indio_dev->ring, 0);
 	if (ret) {
 		printk(KERN_ERR "failed to initialize the ring\n");
 		goto error_unreg_ring_funcs;
@@ -588,7 +588,7 @@ error_unregister_line:
 	if (spi->irq)
 		iio_unregister_interrupt_line(st->indio_dev, 0);
 error_uninitialize_ring:
-	adis16260_uninitialize_ring(st->indio_dev->ring);
+	iio_ring_buffer_unregister(st->indio_dev->ring);
 error_unreg_ring_funcs:
 	adis16260_unconfigure_ring(st->indio_dev);
 error_free_dev:
@@ -622,15 +622,13 @@ static int adis16260_remove(struct spi_device *spi)
 	if (spi->irq)
 		iio_unregister_interrupt_line(indio_dev, 0);
 
-	adis16260_uninitialize_ring(indio_dev->ring);
+	iio_ring_buffer_unregister(st->indio_dev->ring);
 	iio_device_unregister(indio_dev);
 	adis16260_unconfigure_ring(indio_dev);
 	kfree(st->tx);
 	kfree(st->rx);
 	kfree(st);
 
-	return 0;
-
 err_ret:
 	return ret;
 }

drivers/staging/iio/gyro/adis16260_ring.c

@@ -215,13 +215,3 @@ error_iio_sw_rb_free:
 	iio_sw_rb_free(indio_dev->ring);
 	return ret;
 }
-
-int adis16260_initialize_ring(struct iio_ring_buffer *ring)
-{
-	return iio_ring_buffer_register(ring, 0);
-}
-
-void adis16260_uninitialize_ring(struct iio_ring_buffer *ring)
-{
-	iio_ring_buffer_unregister(ring);
-}

drivers/staging/iio/imu/adis16300_core.c

@@ -20,6 +20,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
+#include "../ring_generic.h"
 #include "../accel/accel.h"
 #include "../accel/inclinometer.h"
 #include "../gyro/gyro.h"
@@ -644,7 +645,7 @@ static int __devinit adis16300_probe(struct spi_device *spi)
 		goto error_unreg_ring_funcs;
 	regdone = 1;
 
-	ret = adis16300_initialize_ring(st->indio_dev->ring);
+	ret = iio_ring_buffer_register(st->indio_dev->ring, 0);
 	if (ret) {
 		printk(KERN_ERR "failed to initialize the ring\n");
 		goto error_unreg_ring_funcs;
@@ -676,7 +677,7 @@ error_unregister_line:
 	if (spi->irq)
 		iio_unregister_interrupt_line(st->indio_dev, 0);
 error_uninitialize_ring:
-	adis16300_uninitialize_ring(st->indio_dev->ring);
+	iio_ring_buffer_unregister(st->indio_dev->ring);
 error_unreg_ring_funcs:
 	adis16300_unconfigure_ring(st->indio_dev);
 error_free_dev:
@@ -710,7 +711,7 @@ static int adis16300_remove(struct spi_device *spi)
 	if (spi->irq)
 		iio_unregister_interrupt_line(indio_dev, 0);
 
-	adis16300_uninitialize_ring(indio_dev->ring);
+	iio_ring_buffer_unregister(indio_dev->ring);
 	iio_device_unregister(indio_dev);
 	adis16300_unconfigure_ring(indio_dev);
 	kfree(st->tx);

drivers/staging/iio/imu/adis16300_ring.c

@@ -241,12 +241,3 @@ error_iio_sw_rb_free:
 	return ret;
 }
 
-int adis16300_initialize_ring(struct iio_ring_buffer *ring)
-{
-	return iio_ring_buffer_register(ring, 0);
-}
-
-void adis16300_uninitialize_ring(struct iio_ring_buffer *ring)
-{
-	iio_ring_buffer_unregister(ring);
-}

drivers/staging/iio/imu/adis16350.h

@@ -148,8 +148,6 @@ ssize_t adis16350_read_data_from_ring(struct device *dev,
 int adis16350_configure_ring(struct iio_dev *indio_dev);
 void adis16350_unconfigure_ring(struct iio_dev *indio_dev);
 
-int adis16350_initialize_ring(struct iio_ring_buffer *ring);
-void adis16350_uninitialize_ring(struct iio_ring_buffer *ring);
 #else /* CONFIG_IIO_RING_BUFFER */
 
 static inline void adis16350_remove_trigger(struct iio_dev *indio_dev)
@@ -169,23 +167,5 @@ adis16350_read_data_from_ring(struct device *dev,
 	return 0;
 }
 
-static int adis16350_configure_ring(struct iio_dev *indio_dev)
-{
-	return 0;
-}
-
-static inline void adis16350_unconfigure_ring(struct iio_dev *indio_dev)
-{
-}
-
-static inline int adis16350_initialize_ring(struct iio_ring_buffer *ring)
-{
-	return 0;
-}
-
-static inline void adis16350_uninitialize_ring(struct iio_ring_buffer *ring)
-{
-}
-
 #endif /* CONFIG_IIO_RING_BUFFER */
 #endif /* SPI_ADIS16350_H_ */

drivers/staging/iio/imu/adis16350_core.c

@@ -20,6 +20,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
+#include "../ring_generic.h"
 #include "../accel/accel.h"
 #include "../adc/adc.h"
 #include "../gyro/gyro.h"
@@ -619,7 +620,7 @@ static int __devinit adis16350_probe(struct spi_device *spi)
 		goto error_unreg_ring_funcs;
 	regdone = 1;
 
-	ret = adis16350_initialize_ring(st->indio_dev->ring);
+	ret = iio_ring_buffer_register(st->indio_dev->ring, 0);
 	if (ret) {
 		printk(KERN_ERR "failed to initialize the ring\n");
 		goto error_unreg_ring_funcs;
@@ -651,7 +652,7 @@ error_unregister_line:
 	if (spi->irq)
 		iio_unregister_interrupt_line(st->indio_dev, 0);
 error_uninitialize_ring:
-	adis16350_uninitialize_ring(st->indio_dev->ring);
+	iio_ring_buffer_unregister(st->indio_dev->ring);
 error_unreg_ring_funcs:
 	adis16350_unconfigure_ring(st->indio_dev);
 error_free_dev:
@@ -685,7 +686,7 @@ static int adis16350_remove(struct spi_device *spi)
 	if (spi->irq)
 		iio_unregister_interrupt_line(indio_dev, 0);
 
-	adis16350_uninitialize_ring(indio_dev->ring);
+	iio_ring_buffer_unregister(indio_dev->ring);
 	iio_device_unregister(indio_dev);
 	adis16350_unconfigure_ring(indio_dev);
 	kfree(st->tx);

drivers/staging/iio/imu/adis16350_ring.c

@@ -246,12 +246,3 @@ error_iio_sw_rb_free:
 	return ret;
 }
 
-int adis16350_initialize_ring(struct iio_ring_buffer *ring)
-{
-	return iio_ring_buffer_register(ring, 0);
-}
-
-void adis16350_uninitialize_ring(struct iio_ring_buffer *ring)
-{
-	iio_ring_buffer_unregister(ring);
-}

drivers/staging/iio/imu/adis16400.h

@@ -178,8 +178,6 @@ ssize_t adis16400_read_data_from_ring(struct device *dev,
 int adis16400_configure_ring(struct iio_dev *indio_dev);
 void adis16400_unconfigure_ring(struct iio_dev *indio_dev);
 
-int adis16400_initialize_ring(struct iio_ring_buffer *ring);
-void adis16400_uninitialize_ring(struct iio_ring_buffer *ring);
 #else /* CONFIG_IIO_RING_BUFFER */
 
 static inline void adis16400_remove_trigger(struct iio_dev *indio_dev)
@@ -208,14 +206,5 @@ static inline void adis16400_unconfigure_ring(struct iio_dev *indio_dev)
 {
 }
 
-static inline int adis16400_initialize_ring(struct iio_ring_buffer *ring)
-{
-	return 0;
-}
-
-static inline void adis16400_uninitialize_ring(struct iio_ring_buffer *ring)
-{
-}
-
 #endif /* CONFIG_IIO_RING_BUFFER */
 #endif /* SPI_ADIS16400_H_ */

drivers/staging/iio/imu/adis16400_core.c

@@ -27,6 +27,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
+#include "../ring_generic.h"
 #include "../accel/accel.h"
 #include "../adc/adc.h"
 #include "../gyro/gyro.h"
@@ -641,7 +642,7 @@ static int __devinit adis16400_probe(struct spi_device *spi)
 		goto error_unreg_ring_funcs;
 	regdone = 1;
 
-	ret = adis16400_initialize_ring(st->indio_dev->ring);
+	ret = iio_ring_buffer_register(st->indio_dev->ring, 0);
 	if (ret) {
 		printk(KERN_ERR "failed to initialize the ring\n");
 		goto error_unreg_ring_funcs;
@@ -674,7 +675,7 @@ error_unregister_line:
 	if (st->indio_dev->modes & INDIO_RING_TRIGGERED)
 		iio_unregister_interrupt_line(st->indio_dev, 0);
 error_uninitialize_ring:
-	adis16400_uninitialize_ring(st->indio_dev->ring);
+	iio_ring_buffer_unregister(st->indio_dev->ring);
 error_unreg_ring_funcs:
 	adis16400_unconfigure_ring(st->indio_dev);
 error_free_dev:
@@ -709,7 +710,7 @@ static int adis16400_remove(struct spi_device *spi)
 	if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0)
 		iio_unregister_interrupt_line(indio_dev, 0);
 
-	adis16400_uninitialize_ring(indio_dev->ring);
+	iio_ring_buffer_unregister(st->indio_dev->ring);
 	adis16400_unconfigure_ring(indio_dev);
 	iio_device_unregister(indio_dev);
 	kfree(st->tx);

drivers/staging/iio/imu/adis16400_ring.c

@@ -252,13 +252,3 @@ error_iio_sw_rb_free:
 	iio_sw_rb_free(indio_dev->ring);
 	return ret;
 }
-
-int adis16400_initialize_ring(struct iio_ring_buffer *ring)
-{
-	return iio_ring_buffer_register(ring, 0);
-}
-
-void adis16400_uninitialize_ring(struct iio_ring_buffer *ring)
-{
-	iio_ring_buffer_unregister(ring);
-}

drivers/staging/iio/ring_generic.h

@@ -11,6 +11,8 @@
 #define _IIO_RING_GENERIC_H_
 #include "iio.h"
 
+#ifdef CONFIG_IIO_RING_BUFFER
+
 struct iio_handler;
 struct iio_ring_buffer;
 struct iio_dev;
@@ -287,5 +289,14 @@ ssize_t iio_show_ring_enable(struct device *dev,
 #define IIO_RING_ENABLE_ATTR DEVICE_ATTR(ring_enable, S_IRUGO | S_IWUSR, \
 					 iio_show_ring_enable,		\
 					 iio_store_ring_enable)
+#else /* CONFIG_IIO_RING_BUFFER */
+static inline int iio_ring_buffer_register(struct iio_ring_buffer *ring, int id)
+{
+	return 0;
+};
+static inline void iio_ring_buffer_unregister(struct iio_ring_buffer *ring)
+{};
+
+#endif /* CONFIG_IIO_RING_BUFFER */
 
 #endif /* _IIO_RING_GENERIC_H_ */