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From: John Baldwin <jhb@FreeBSD.org>
Date: Wed, 17 Sep 2014 19:37:58 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r271721 - head/lib/libgeom
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Author: jhb
Date: Wed Sep 17 19:37:58 2014
New Revision: 271721
URL: http://svnweb.freebsd.org/changeset/base/271721

Log:
  Explicitly specify MAP_SHARED when mapping the stats file descriptor.
  
  Reviewed by:	kib
  MFC after:	1 week

Modified:
  head/lib/libgeom/geom_stats.c

Modified: head/lib/libgeom/geom_stats.c
==============================================================================
--- head/lib/libgeom/geom_stats.c	Wed Sep 17 19:09:58 2014	(r271720)
+++ head/lib/libgeom/geom_stats.c	Wed Sep 17 19:37:58 2014	(r271721)
@@ -68,7 +68,7 @@ geom_stats_resync(void)
 		return;
 	for (;;) {
 		p = mmap(statp, (npages + 1) * pagesize, 
-		    PROT_READ, 0, statsfd, 0);
+		    PROT_READ, MAP_SHARED, statsfd, 0);
 		if (p == MAP_FAILED)
 			break;
 		else
@@ -90,7 +90,7 @@ geom_stats_open(void)
 		return (errno);
 	pagesize = getpagesize();
 	spp = pagesize / sizeof(struct devstat);
-	p = mmap(NULL, pagesize, PROT_READ, 0, statsfd, 0);
+	p = mmap(NULL, pagesize, PROT_READ, MAP_SHARED, statsfd, 0);
 	if (p == MAP_FAILED) {
 		error = errno;
 		close(statsfd);