gentoo-overlay/media-sound/alsa-headers/files/alsa-headers-1.0.6a-user.patch

--- alsa-kernel/include/asound.h
+++ alsa-kernel/include/asound.h
@@ -63,6 +63,10 @@
 #include <sys/types.h>
 #endif
 
+#ifndef __user
+#define __user
+#endif
+
 /*
  *  protocol version
  */