From 0163c1c521ff8b09cd8ca395003cc00178161d77 Mon Sep 17 00:00:00 2001
From: YueHaibing <yuehaibing@huawei.com>
Date: Mon, 11 Nov 2019 11:21:15 +0800
Subject: [PATCH] iio: st_accel: Fix unused variable warning
Git-commit: 0163c1c521ff8b09cd8ca395003cc00178161d77
Patch-mainline: v5.5-rc2
References: git-fixes

drivers/iio/accel/st_accel_core.c:1005:44: warning:
 mount_matrix_ext_info defined but not used [-Wunused-const-variable=]

Using stub helper while CONFIG_ACPI is disabled to fix it.

Suggested-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/iio/accel/st_accel_core.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/drivers/iio/accel/st_accel_core.c
+++ b/drivers/iio/accel/st_accel_core.c
@@ -994,6 +994,7 @@ static const struct iio_trigger_ops st_a
 #define ST_ACCEL_TRIGGER_OPS NULL
 #endif
 
+#ifdef CONFIG_ACPI
 static const struct iio_mount_matrix *
 get_mount_matrix(const struct iio_dev *indio_dev,
 		 const struct iio_chan_spec *chan)
@@ -1014,7 +1015,6 @@ static const struct iio_chan_spec_ext_in
 static int apply_acpi_orientation(struct iio_dev *indio_dev,
 				  struct iio_chan_spec *channels)
 {
-#ifdef CONFIG_ACPI
 	struct st_sensor_data *adata = iio_priv(indio_dev);
 	struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
 	struct acpi_device *adev;
@@ -1142,10 +1142,14 @@ static int apply_acpi_orientation(struct
 out:
 	kfree(buffer.pointer);
 	return ret;
+}
 #else /* !CONFIG_ACPI */
+static int apply_acpi_orientation(struct iio_dev *indio_dev,
+				  struct iio_chan_spec *channels)
+{
 	return 0;
-#endif
 }
+#endif
 
 int st_accel_common_probe(struct iio_dev *indio_dev)
 {