From c4f13bc72a62b78a30c56ea6c7795d0e2122f608 Mon Sep 17 00:00:00 2001
From: Michael Kerrisk <mtk.manpages@gmail.com>
Date: Tue, 21 Jan 2020 21:49:06 +0100
Subject: [PATCH] userfaultfd.2: Tweaks to Yang Xu's patch

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
---
 man2/userfaultfd.2 | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/man2/userfaultfd.2 b/man2/userfaultfd.2
index 2b432f043..32fe7236d 100644
--- a/man2/userfaultfd.2
+++ b/man2/userfaultfd.2
@@ -441,10 +441,13 @@ reached.
 .B ENOMEM
 Insufficient kernel memory was available.
 .TP
-.B EPERM
-Unprivileged user(without SYS_CAP_PTRACE capability) uses this call when
-set unprivileged_userfaultfd to 0. It was introduced since Linux 5.2.
+.BR EPERM " (since Linux 5.2)"
 .\" cefdca0a86be517bc390fc4541e3674b8e7803b0
+The caller is not privileged (does not have the
+.B CAP_SYS_PTRACE
+capability), and
+.I /proc/sys/vm/unprivileged_userfaultfd
+has the value 0.
 .SH VERSIONS
 The
 .BR userfaultfd ()