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sysroot/usr/include/linux/patchkey.h

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+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * <linux/patchkey.h> -- definition of _PATCHKEY macro
+ *
+ * Copyright (C) 2005 Stuart Brady
+ *
+ * This exists because awe_voice.h defined its own _PATCHKEY and it wasn't
+ * clear whether removing this would break anything in userspace.
+ *
+ * Do not include this file directly.  Please use <sys/soundcard.h> instead.
+ * For kernel code, use <linux/soundcard.h>
+ */
+
+#ifndef _LINUX_PATCHKEY_H_INDIRECT
+#error "patchkey.h included directly"
+#endif
+
+#ifndef _LINUX_PATCHKEY_H
+#define _LINUX_PATCHKEY_H
+
+/* Endian macros. */
+#  include <endian.h>
+
+#if defined(__BYTE_ORDER)
+#  if __BYTE_ORDER == __BIG_ENDIAN
+#    define _PATCHKEY(id) (0xfd00|id)
+#  elif __BYTE_ORDER == __LITTLE_ENDIAN
+#    define _PATCHKEY(id) ((id<<8)|0x00fd)
+#  else
+#    error "could not determine byte order"
+#  endif
+#endif
+
+#endif /* _LINUX_PATCHKEY_H */