[LTP] [PATCH v4] syscalls/membarrier: Add membarrier() initial test

[Jan Stancek <jstancek@redhat.com>]

----- Original Message -----
> On 10/8/18 11:07 AM, Jan Stancek wrote:
> > 
> > 
> > ----- Original Message -----
> >> Fixes: #265
> >>
> >> Initial test for membarrier() syscall. It tests all existing membarrier
> >> "commands" (or features), including the need (or not) for previous
> >> registration for the call to work.
> >>
> >> Some features did not exist in older kernels and that is covered by
> >> skipping some calls, flagging test as skipped & okay, and forcing
> >> others, making sure that return codes and errno are set right in those
> >> cases.
> >>
> >> Tests are done in a child process due to inexistent kernel interface to
> >> "unregister" the process from being affected by membarrier() call.
> >>
> >> Signed-off-by: Rafael David Tinoco <rafael.tinoco@linaro.org>
> > 
> > Looks good to me.
> > 
> > We probably can drop linux/membarrier.h configure check, right?
> > (since v4 doesn't include it and unsupported kernel should
> > hit ENOSYS and TCONF)
> 
> Ooops, true. No need to check HAVE_LINUX_MEMBARRIER_H if we are
> declaring all CMDs and will be given ENOSYS. Want me to send a v5 ?

Let's give a couple days to other potential reviewers. If nothing
else comes up, I can drop it before push.

Thanks,
Jan