can_split_huge_page  164 include/linux/huge_mm.h bool can_split_huge_page(struct page *page, int *pextra_pins);
can_split_huge_page 2756 mm/huge_memory.c 	if (!can_split_huge_page(head, &extra_pins)) {
can_split_huge_page 1294 mm/vmscan.c    					if (!can_split_huge_page(page, NULL))