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-rw-r--r--lib/libc/sys/madvise.26
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/libc/sys/madvise.2 b/lib/libc/sys/madvise.2
index d852ef58556..5d18e7ce977 100644
--- a/lib/libc/sys/madvise.2
+++ b/lib/libc/sys/madvise.2
@@ -60,6 +60,12 @@ The known behaviors are given in
#define MADV_DONTNEED 4 /* don't need these pages */
#define MADV_SPACEAVAIL 5 /* insure that resources are reserved */
.Ed
+.Sh RETURN VALUES
+Upon successful completion,
+a value of 0 is returned.
+Otherwise, a value of -1 is returned and
+.Va errno
+is set to indicate the error.
.Sh SEE ALSO
.Xr mincore 2 ,
.Xr minherit 2 ,