[LTP] [PATCH] mlock_8-1, munlock_10-1: don't use LONG_MAX as invalid pointer

[Jan Stancek]

----- Original Message -----
> Hi Jan,
> 
> > arm64 kernel with commit 057d3389108e ("mm: untag user pointers passed to
> > memory syscalls") will assume this is tagged user pointer and will
> > attempt to clear first byte. This leads to test hitting different error
> > (EINVAL instead of ENOMEM).
> 
> > Add a helper function which provides invalid/unused pointer from user
> > address space.
> 
> > Signed-off-by: Jan Stancek <jstancek@redhat.com>
> Reviewed-by: Petr Vorel <pvorel@suse.cz>

Thanks, discussion in:
  http://lists.linux.it/pipermail/ltp/2019-October/013993.html
is still going, so maybe this will be fixed on kernel side
after all.