[PATCH] usb/audio: guard kernel-only code with __KERNEL__

["Michael S. Tsirkin" <mst@redhat.com>]

include/linux/usb/audio.h is exported to userspace,
so part of this file that is for internal kernel
usage need to be guarded with ifdef __KERNEL__.
This way make headers_install will stript it out.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/linux/usb/audio.h |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/include/linux/usb/audio.h b/include/linux/usb/audio.h
index b5744bc..353a300 100644
--- a/include/linux/usb/audio.h
+++ b/include/linux/usb/audio.h
@@ -258,6 +258,8 @@ struct usb_as_iso_endpoint_descriptor {
 };
 #define USB_AS_ISO_ENDPOINT_DESC_SIZE	7
 
+#ifdef __KERNEL__
+
 #define FU_CONTROL_UNDEFINED		0x00
 #define MUTE_CONTROL			0x01
 #define VOLUME_CONTROL			0x02
@@ -311,4 +313,5 @@ struct usb_audio_control_selector {
 	struct usb_descriptor_header *desc;
 };
 
+#endif /* __KERNEL__ */
 #endif /* __LINUX_USB_AUDIO_H */
-- 
1.6.2.5