4 files changed, 24 insertions, 5 deletions
diff --git a/share/man/man4/linprocfs.4 b/share/man/man4/linprocfs.4
index 53940d7c02b0..dcd1c642b409 100644
--- a/share/man/man4/linprocfs.4
+++ b/share/man/man4/linprocfs.4
@@ -9,7 +9,7 @@
 .Nd Linux process file system
 .Sh SYNOPSIS
 .Bd -literal
-linproc		/compat/linux/proc	linprocfs	rw 0 0
+linprocfs		/compat/linux/proc	linprocfs	rw 0 0
 .Ed
 .Sh DESCRIPTION
 The Linux process file system, or
@@ -138,7 +138,7 @@ To mount a
 file system on
 .Pa /compat/linux/proc :
 .Pp
-.Dl "mount -t linprocfs linproc /compat/linux/proc"
+.Dl "mount -t linprocfs linprocfs /compat/linux/proc"
 .Sh SEE ALSO
 .Xr mount 2 ,
 .Xr unmount 2 ,
diff --git a/share/man/man4/linsysfs.4 b/share/man/man4/linsysfs.4
index 12729a814085..045e1af89173 100644
--- a/share/man/man4/linsysfs.4
+++ b/share/man/man4/linsysfs.4
@@ -9,7 +9,7 @@
 .Nd Linux kernel objects file system
 .Sh SYNOPSIS
 .Bd -literal
-linsys		/compat/linux/sys	linsysfs	rw 0 0
+linsysfs		/compat/linux/sys	linsysfs	rw 0 0
 .Ed
 .Sh DESCRIPTION
 The
@@ -66,7 +66,7 @@ The PCI device hierarchy node.
 .Sh EXAMPLES
 The most common usage follows:
 .Pp
-.Dl "mount -t linsysfs linsys /compat/linux/sys"
+.Dl "mount -t linsysfs linsysfs /compat/linux/sys"
 .Pp
 where
 .Pa /compat/linux/sys
diff --git a/share/man/man9/VOP_OPENCLOSE.9 b/share/man/man9/VOP_OPENCLOSE.9
index 9a4f7069962d..672f9faa92f5 100644
--- a/share/man/man9/VOP_OPENCLOSE.9
+++ b/share/man/man9/VOP_OPENCLOSE.9
@@ -26,7 +26,7 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd December 2, 2009
+.Dd October 17, 2025
 .Dt VOP_OPEN 9
 .Os
 .Sh NAME
@@ -78,6 +78,17 @@ The access mode is a set of flags, including
 .Dv FWRITE ,
 .Dv O_NONBLOCK ,
 .Dv O_APPEND .
+.Pp
+The thread
+.Fa td
+passed to
+.Fn VOP_CLOSE
+may be
+.Ql NULL
+if the last reference to the open file is released from a kernel context, e.g.,
+the destruction of a socket buffer containing the file reference in a
+.Dv SCM_RIGHTS
+message.
 .Sh LOCKS
 .Fn VOP_OPEN
 expects
diff --git a/share/mk/bsd.man.mk b/share/mk/bsd.man.mk
index 0a3594e05d94..1591a3e0905e 100644
--- a/share/mk/bsd.man.mk
+++ b/share/mk/bsd.man.mk
@@ -97,6 +97,14 @@ manlinksinstall: .PHONY
 
 all-man:
 
+# Take groups from both MANGROUPS and MANGROUPS.yes, to allow syntax like
+# MANGROUPS.${MK_FOO}=FOO.  Sort and uniq the list of groups in case of
+# duplicates.
+.if defined(MANGROUPS) || defined(MANGROUPS.yes)
+MANGROUPS:=${MANGROUPS} ${MANGROUPS.yes}
+MANGROUPS:=${MANGROUPS:O:u}
+.endif
+
 .for __group in ${MANGROUPS}
 
 realmaninstall: realmaninstall-${__group}