[PATCH] IIO: struct iio_dev_attr should be defined as static.

[sonic zhang]

Otherwise link errors "multiple definition of `iio_dev_attr_mode'"
are reported when compile multiple different iio drivers with the
same attribute name.

Signed-off-by: Sonic Zhang <sonic.adi@xxxxxxxxx>
---
 drivers/staging/iio/sysfs.h |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/iio/sysfs.h b/drivers/staging/iio/sysfs.h
index e501e13..39d207e 100644
--- a/drivers/staging/iio/sysfs.h
+++ b/drivers/staging/iio/sysfs.h
@@ -95,16 +95,16 @@ struct iio_const_attr {
 			.val2 = _val2 }
 
 #define IIO_DEVICE_ATTR(_name, _mode, _show, _store, _addr)	\
-	struct iio_dev_attr iio_dev_attr_##_name		\
+	static struct iio_dev_attr iio_dev_attr_##_name		\
 	= IIO_ATTR(_name, _mode, _show, _store, _addr)
 
 
 #define IIO_DEVICE_ATTR_2(_name, _mode, _show, _store, _addr, _val2)	\
-	struct iio_dev_attr iio_dev_attr_##_name			\
+	static struct iio_dev_attr iio_dev_attr_##_name			\
 	= IIO_ATTR_2(_name, _mode, _show, _store, _addr, _val2)
 
 #define IIO_CONST_ATTR(_name, _string)					\
-	struct iio_const_attr iio_const_attr_##_name			\
+	static struct iio_const_attr iio_const_attr_##_name			\
 	= { .string = _string,						\
 	    .dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)}
 
-- 
1.6.0



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