page_numtomemseg_nolock
extern struct memseg *page_numtomemseg_nolock(pfn_t pfnum);
if (page_numtomemseg_nolock(pfn) !=
page_numtomemseg_nolock(pfn + pages - 1)) {
page_numtomemseg_nolock(pfn) != NULL)
mseg = page_numtomemseg_nolock(pfn); \
mseg = page_numtomemseg_nolock(pfn); \
if ((mseg = page_numtomemseg_nolock(pfn)) != NULL) {