linux-kernel - [PATCH 22/24] membarrier.2: Note that glibc does not provide a wrapper

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Message-Id: <20200910211344.3562-23-colomar.6.4.3@gmail.com>
Date:   Thu, 10 Sep 2020 23:13:43 +0200
From:   Alejandro Colomar <colomar.6.4.3@...il.com>
To:     mtk.manpages@...il.com
Cc:     linux-man@...r.kernel.org, linux-kernel@...r.kernel.org,
        Alejandro Colomar <colomar.6.4.3@...il.com>
Subject: [PATCH 22/24] membarrier.2: Note that glibc does not provide a wrapper

Notes: I copied .nf and .fi from futex.2, but they made no visual difference.
What do they actually do?

Signed-off-by: Alejandro Colomar <colomar.6.4.3@...il.com>
---
 man2/membarrier.2 | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/man2/membarrier.2 b/man2/membarrier.2
index 8825de71e..f65c6be5c 100644
--- a/man2/membarrier.2
+++ b/man2/membarrier.2
@@ -26,9 +26,15 @@
 .SH NAME
 membarrier \- issue memory barriers on a set of threads
 .SH SYNOPSIS
+.nf
+.PP
 .B #include <linux/membarrier.h>
 .PP
 .BI "int membarrier(int " cmd ", int " flags ");"
+.fi
+.PP
+.IR Note :
+There is no glibc wrapper for this system call; see NOTES.
 .SH DESCRIPTION
 The
 .BR membarrier ()
@@ -270,6 +276,9 @@ Examples where
 .BR membarrier ()
 can be useful include implementations
 of Read-Copy-Update libraries and garbage collectors.
+.PP
+Glibc does not provide a wrapper for this system call; call it using
+.BR syscall (2).
 .SH EXAMPLES
 Assuming a multithreaded application where "fast_path()" is executed
 very frequently, and where "slow_path()" is executed infrequently, the
-- 
2.28.0