4.7-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Lars-Peter Clausen <l...@metafoo.de>

commit b2f0c09664b72b2f8c581383a9337ac3092e42c8 upstream.

Use the IS_ENABLED() helper macro to ensure that the configfs group is
initialized either when configfs is built-in or when configfs is built as a
module. Otherwise software trigger creation will result in undefined
behaviour when configfs is built as a mdoule since the configfs group for
the trigger is not properly initialized.

Fixes: b662f809d410 ("iio: core: Introduce IIO software triggers")
Signed-off-by: Lars-Peter Clausen <l...@metafoo.de>
Acked-by: Daniel Baluta <daniel.bal...@intel.com>
Signed-off-by: Jonathan Cameron <ji...@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 include/linux/iio/sw_trigger.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/linux/iio/sw_trigger.h
+++ b/include/linux/iio/sw_trigger.h
@@ -62,7 +62,7 @@ void iio_swt_group_init_type_name(struct
                                  const char *name,
                                  struct config_item_type *type)
 {
-#ifdef CONFIG_CONFIGFS_FS
+#if IS_ENABLED(CONFIG_CONFIGFS_FS)
        config_group_init_type_name(&t->group, name, type);
 #endif
 }


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