From cca4e32eb3b71a1220e94058272deede9489a41b Mon Sep 17 00:00:00 2001
From: Alejandro Colomar <alx.manpages@gmail.com>
Date: Sat, 15 May 2021 20:20:25 +0200
Subject: [PATCH] s390_runtime_instr.2: Use syscall(SYS_...); for system calls
 without a wrapper

Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
---
 man2/s390_runtime_instr.2 | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/man2/s390_runtime_instr.2 b/man2/s390_runtime_instr.2
index 2ec6e7d25..0685fde6c 100644
--- a/man2/s390_runtime_instr.2
+++ b/man2/s390_runtime_instr.2
@@ -27,13 +27,18 @@
 s390_runtime_instr \- enable/disable s390 CPU run-time instrumentation
 .SH SYNOPSIS
 .nf
-.B #include <asm/runtime_instr.h>
+.BR "#include <asm/runtime_instr.h>" " /* Definition of " S390_* " constants */"
+.BR "#include <sys/syscall.h>" "       /* Definition of " SYS_* " constants */"
+.B #include <unistd.h>
 .PP
-.BI "int s390_runtime_instr(int " command ", int " signum ");"
+.BI "int syscall(SYS_s390_runtime_instr, int " command ", int " signum );
 .fi
 .PP
 .IR Note :
-There is no glibc wrapper for this system call; see NOTES.
+glibc provides no wrapper for
+.BR s390_runtime_instr (2),
+necessitating the use of
+.BR syscall (2).
 .SH DESCRIPTION
 The
 .BR s390_runtime_instr ()
@@ -97,9 +102,6 @@ This Linux-specific system call is available only on the s390 architecture.
 The run-time instrumentation facility is available
 beginning with System z EC12.
 .SH NOTES
-Glibc does not provide a wrapper for this system call; call it using
-.BR syscall (2)
-.PP
 The
 .I asm/runtime_instr.h
 header file is available