svn commit: r239345 - head/lib/libc/stdlib

[Kevin Lo]

Author: kevlo
Date: Fri Aug 17 01:05:56 2012
New Revision: 239345
URL: http://svn.freebsd.org/changeset/base/239345

Log:
  Make 'junk' volatile so that compilers won't be tempted to optimize
  
  Reviewed by:	ache
  MFC after:	3 days

Modified:
  head/lib/libc/stdlib/random.c

Modified: head/lib/libc/stdlib/random.c
==============================================================================
--- head/lib/libc/stdlib/random.c	Fri Aug 17 00:49:29 2012	(r239344)
+++ head/lib/libc/stdlib/random.c	Fri Aug 17 01:05:56 2012	(r239345)
@@ -315,7 +315,7 @@ srandomdev()
 
 	if (!done) {
 		struct timeval tv;
-		unsigned long junk;
+		volatile unsigned long junk;
 
 		gettimeofday(&tv, NULL);
 		srandom((getpid() << 16) ^ tv.tv_sec ^ tv.tv_usec ^ junk);