svn commit: r273145 - stable/10/lib/libgeom

[John Baldwin]

Author: jhb
Date: Wed Oct 15 19:27:14 2014
New Revision: 273145
URL: https://svnweb.freebsd.org/changeset/base/273145

Log:
  MFC 271721:
  Explicitly specify MAP_SHARED when mapping the stats file descriptor.

Modified:
  stable/10/lib/libgeom/geom_stats.c
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/lib/libgeom/geom_stats.c
==============================================================================
--- stable/10/lib/libgeom/geom_stats.c	Wed Oct 15 19:12:05 2014	(r273144)
+++ stable/10/lib/libgeom/geom_stats.c	Wed Oct 15 19:27:14 2014	(r273145)
@@ -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);