hugetlb_vma_trylock_write
if (!hugetlb_vma_trylock_write(vma)) {
if (!hugetlb_vma_trylock_write(vma))
int hugetlb_vma_trylock_write(struct vm_area_struct *vma);
if (!hugetlb_vma_trylock_write(vma))
if (!hugetlb_vma_trylock_write(vma)) {