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MFC 271721:

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Explicitly specify MAP_SHARED when mapping the stats file descriptor.
This commit is contained in:
jhb 2014-10-15 19:27:14 +00:00
parent 92c5a45b89
commit 44cc4e9f20
1 changed files with 2 additions and 2 deletions
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4
lib/libgeom/geom_stats.c
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@ -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);