Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 .../PR_FUTEX_HASH_GET_IMMUTABLE.2const        | 37 +++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 man/man2const/PR_FUTEX_HASH_GET_IMMUTABLE.2const

diff --git a/man/man2const/PR_FUTEX_HASH_GET_IMMUTABLE.2const b/man/man2const/PR_FUTEX_HASH_GET_IMMUTABLE.2const
new file mode 100644
index 0000000000000..be5f457f0dcb6
--- /dev/null
+++ b/man/man2const/PR_FUTEX_HASH_GET_IMMUTABLE.2const
@@ -0,0 +1,37 @@
+.\" Copyright, the authors of the Linux man-pages project
+.\"
+.\" SPDX-License-Identifier: Linux-man-pages-copyleft
+.\"
+.TH PR_FUTEX_HASH_GET_IMMUTABLE 2const (date) "Linux man-pages (unreleased)"
+.SH NAME
+PR_FUTEX_HASH_GET_IMMUTABLE
+\-
+check if the private hash is immutable.
+.SH LIBRARY
+Standard C library
+.RI ( libc ,\~ \-lc )
+.SH SYNOPSIS
+.nf
+.BR "#include <linux/prctl.h>" "  /* Definition of " PR_* " constants */"
+.B #include <sys/prctl.h>
+.P
+.B int prctl(PR_FUTEX_HASH, PR_FUTEX_HASH_GET_IMMUTABLE);
+.fi
+.SH DESCRIPTION
+Check if the private hash is immutable.
+.SH RETURN VALUE
+A value of 1 means that a the hash has been made immutable
+and not be changed.
+Otherwise 0.
+On error, \-1 is returned, and
+.I errno
+is set to indicate the error.
+.SH STANDARDS
+Linux.
+.SH HISTORY
+Linux 6.16.
+.SH SEE ALSO
+.BR prctl (2),
+.BR PR_FUTEX_HASH (2const),
+.BR PR_FUTEX_HASH_GET_SLOTS (2const),
+.BR PR_FUTEX_HASH_SET_SLOTS (2const)
-- 
2.49.0

Hi Sebastian,

On Mon, May 26, 2025 at 05:55:23PM +0200, Sebastian Andrzej Siewior wrote:
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> ---
>  .../PR_FUTEX_HASH_GET_IMMUTABLE.2const        | 37 +++++++++++++++++++
>  1 file changed, 37 insertions(+)
>  create mode 100644 man/man2const/PR_FUTEX_HASH_GET_IMMUTABLE.2const
> 
> diff --git a/man/man2const/PR_FUTEX_HASH_GET_IMMUTABLE.2const b/man/man2const/PR_FUTEX_HASH_GET_IMMUTABLE.2const
> new file mode 100644
> index 0000000000000..be5f457f0dcb6
> --- /dev/null
> +++ b/man/man2const/PR_FUTEX_HASH_GET_IMMUTABLE.2const
> @@ -0,0 +1,37 @@
> +.\" Copyright, the authors of the Linux man-pages project
> +.\"
> +.\" SPDX-License-Identifier: Linux-man-pages-copyleft
> +.\"
> +.TH PR_FUTEX_HASH_GET_IMMUTABLE 2const (date) "Linux man-pages (unreleased)"
> +.SH NAME
> +PR_FUTEX_HASH_GET_IMMUTABLE
> +\-
> +check if the private hash is immutable.
> +.SH LIBRARY
> +Standard C library
> +.RI ( libc ,\~ \-lc )
> +.SH SYNOPSIS
> +.nf
> +.BR "#include <linux/prctl.h>" "  /* Definition of " PR_* " constants */"
> +.B #include <sys/prctl.h>
> +.P
> +.B int prctl(PR_FUTEX_HASH, PR_FUTEX_HASH_GET_IMMUTABLE);
> +.fi
> +.SH DESCRIPTION
> +Check if the private hash is immutable.
> +.SH RETURN VALUE
> +A value of 1 means that a the hash has been made immutable
> +and not be changed.
> +Otherwise 0.

I'd reword this paragraph:

	If the hash is immutable,
	it returns 1;
	otherwise,
	it returns 0.

And I'd put the following on a separate paragraph:

	.P

> +On error, \-1 is returned, and
> +.I errno
> +is set to indicate the error.
> +.SH STANDARDS
> +Linux.
> +.SH HISTORY
> +Linux 6.16.
> +.SH SEE ALSO
> +.BR prctl (2),
> +.BR PR_FUTEX_HASH (2const),
> +.BR PR_FUTEX_HASH_GET_SLOTS (2const),
> +.BR PR_FUTEX_HASH_SET_SLOTS (2const)
> -- 
> 2.49.0

Cheers,
Alex

-- 
<https://www.alejandro-colomar.es/>