[src/trunk]: src/share/man/man9 Note limited extent for reference to the pser...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/494433fa4233
branches:  trunk
changeset: 343238:494433fa4233
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Tue Jan 26 01:09:56 2016 +0000

description:
Note limited extent for reference to the pserialized object.

diffstat:

 share/man/man9/pserialize.9 |  9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diffs (23 lines):

diff -r c14bdcfa4009 -r 494433fa4233 share/man/man9/pserialize.9
--- a/share/man/man9/pserialize.9       Tue Jan 26 01:05:17 2016 +0000
+++ b/share/man/man9/pserialize.9       Tue Jan 26 01:09:56 2016 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: pserialize.9,v 1.11 2016/01/26 01:05:17 riastradh Exp $
+.\"    $NetBSD: pserialize.9,v 1.12 2016/01/26 01:09:56 riastradh Exp $
 .\"
 .\" Copyright (c) 2011 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -117,6 +117,13 @@
                /* Fetch f before we fetch anything f points to.  */
                membar_datadep_consumer();
                if (f->f_... == key) {
+                       /*
+                        * Grab whatever part of the frotz we need.
+                        * Note that we can't use the frotz after
+                        * pserialize_read_exit, without a stronger
+                        * kind of reference, say a reference count
+                        * managed by atomic_ops(3).
+                        */
                        *resultp = f->f_...;
                        error = 0;
                        break;