On Wed, Jun 09, 2021 at 07:47:43PM +0200, Christian Borntraeger wrote:

An alternative would be to provide a vmalloc_no_huge function in generic
code  (similar to  vmalloc_32) (or if preferred in s390 base architecture code)
Something like

void *vmalloc_no_huge(unsigned long size)
{
        return __vmalloc_node_flags(size, NUMA_NO_NODE,VM_NO_HUGE_VMAP |
                                GFP_KERNEL | __GFP_ZERO);
}
EXPORT_SYMBOL(vmalloc_no_huge);

or a similar vzalloc variant.

Exactly.  Given that this seems to be a weird pecularity of legacy s390
interfaces I'd only export it for 390 for now, although for
documentation purposes I'd probably still keep it in vmalloc.c.