HID: hidraw: warn if userspace headers are outdated

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / samples / hidraw / hid-example.c

diff --git a/samples/hidraw/hid-example.c b/samples/hidraw/hid-example.c
index 816e2dcda7ca9d244a5e4321aa477267bb07a46f..512a7e50bcae19dd3d7dc40edb3741198f0512ac 100644 (file)
--- a/samples/hidraw/hid-example.c
+++ b/samples/hidraw/hid-example.c
@@ -17,10 +17,9 @@
 /*
  * Ugly hack to work around failing compilation on systems that don't
  * yet populate new version of hidraw.h to userspace.
- *
- * If you need this, please have your distro update the kernel headers.
  */
 #ifndef HIDIOCSFEATURE
+#warning Please have your distro update the userspace kernel headers
 #define HIDIOCSFEATURE(len)    _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x06, len)
 #define HIDIOCGFEATURE(len)    _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x07, len)
 #endif