[PATCH] process_madvise.2: Add note about missing glibc wrapper

[Alejandro Colomar <alx.manpages@gmail.com>]

Glibc bug: <https://sourceware.org/bugzilla/show_bug.cgi?id=27380>
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
---
 man2/process_madvise.2 | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/man2/process_madvise.2 b/man2/process_madvise.2
index d33c32f63..9dc90ced1 100644
--- a/man2/process_madvise.2
+++ b/man2/process_madvise.2
@@ -36,6 +36,10 @@ process_madvise \- give advice about use of memory to a process
 .BI "                        unsigned long " vlen ", int " advice ,
 .BI "                        unsigned int " flags ");"
 .fi
+.PP
+.IR Note :
+There is no glibc wrapper for this system call; see NOTES.
+.\" FIXME: See <https://sourceware.org/bugzilla/show_bug.cgi?id=27380>
 .SH DESCRIPTION
 The
 .BR process_madvise()
@@ -218,6 +222,9 @@ Support for this system call is optional,
 depending on the setting of the
 .B CONFIG_ADVISE_SYSCALLS
 configuration option.
+.SH NOTES
+Glibc does not provide a wrapper for this system call; call it using
+.BR syscall (2).
 .SH SEE ALSO
 .BR madvise (2),
 .BR pidfd_open (2),
-- 
2.30.0