pprivate_head     114 include/xen/grant_table.h int gnttab_alloc_grant_references(u16 count, grant_ref_t *pprivate_head);
pprivate_head     120 include/xen/grant_table.h int gnttab_empty_grant_references(const grant_ref_t *pprivate_head);
pprivate_head     122 include/xen/grant_table.h int gnttab_claim_grant_reference(grant_ref_t *pprivate_head);