From f3c29937e678c3baf89b138d822e6edd46af7009 Mon Sep 17 00:00:00 2001
From: Michael Kerrisk <mtk.manpages@gmail.com>
Date: Mon, 6 Apr 2020 07:50:41 +0200
Subject: [PATCH] prctl.2: Note semantics of IO_FLUSHER state with respect to
 fork(2) and execve(2)

Reported-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
---
 man2/prctl.2 | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/man2/prctl.2 b/man2/prctl.2
index a6c7f0435..e321d8457 100644
--- a/man2/prctl.2
+++ b/man2/prctl.2
@@ -1401,6 +1401,11 @@ and
 .IR arg5
 must be zero.
 .IP
+The IO_FLUSHER state is inherited by a child process created via
+.BR fork (2)
+and is preserved across
+.BR execve (2).
+.IP
 Examples of IO_FLUSHER applications are FUSE daemons, SCSI device
 emulation daemons, and daemons that perform error handling like multipath
 path recovery applications.