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From: Kyle Evans <kevans@FreeBSD.org>
Date: Mon, 19 Aug 2019 18:15:17 +0000 (UTC)
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Subject: svn commit: r351227 - head/sys/mips/include
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Author: kevans
Date: Mon Aug 19 18:15:17 2019
New Revision: 351227
URL: https://svnweb.freebsd.org/changeset/base/351227

Log:
  mips: avoid empty mdproc struct
  
  Compiling with a more modern toolchain than GCC 4.2 in base warns about the
  empty struct. Take a hint and comment from r350902+r350953 by luporl@.

Modified:
  head/sys/mips/include/proc.h

Modified: head/sys/mips/include/proc.h
==============================================================================
--- head/sys/mips/include/proc.h	Mon Aug 19 17:54:40 2019	(r351226)
+++ head/sys/mips/include/proc.h	Mon Aug 19 18:15:17 2019	(r351227)
@@ -79,7 +79,8 @@ struct mdthread {
 #define	MDTD_COP2USED	0x0002		/* Process used the COP2 */
 
 struct mdproc {
-	/* empty */
+	/* Avoid empty structs because they are undefined behavior. */
+	long	md_spare;
 };
 
 struct syscall_args {