__pmd_trans_huge_lock
spinlock_t *__pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma);
return __pmd_trans_huge_lock(pmd, vma);
ptl = __pmd_trans_huge_lock(pmd, vma);
old_ptl = __pmd_trans_huge_lock(old_pmd, vma);
ptl = __pmd_trans_huge_lock(pmd, vma);