__next_mem_pfn_range
void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,
for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \
i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid))