[PATCH] Linux: Implement membarrier function

[Rich Felker]

On Wed, Nov 28, 2018 at 04:05:01PM +0100, Florian Weimer wrote:
> This is essentially a repost of last year's patch, rebased to the glibc
> 2.29 symbol version and reflecting the introduction of
> MEMBARRIER_CMD_GLOBAL.
> 
> I'm not including any changes to manual/ here because the set of
> supported operations is evolving rapidly, we could not get consensus for
> the language I proposed the last time, and I do not want to contribute
> to the manual for the time being.
> 
> Thanks,
> Florian
> 
> 2018-11-28  Florian Weimer  <fweimer@redhat.com>
> 
> 	Linux: Implement membarrier function.
> 	* sysdeps/unix/sysv/linux/Makefile (sysdep_headers): Add
> 	sys/membarrier.h.
> 	(tests): Add tst-membarrier.
> 	* sysdeps/unix/sysv/linux/Versions (GLIBC_2.27): Add membarrier.
> 	* sysdeps/unix/sysv/linux/sys/membarrier.h: New file.

I notice that the declaration moved from sys/mman.h to this new header
since the previous version of this patch. Is this an intentional
change, and is it where everyone now intends/agrees for it to be when
it gets merged?

Rich