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

Michael Kerrisk (man-pages)
2020-09-11T06:45:09Z

On 9/10/20 11:13 PM, Alejandro Colomar wrote:
> 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@gmail.com>

Thanks, Alex. Patch applied.

Cheers,

Michael

> ---
> 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
>

--
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/