ptlock_ptr 702 arch/x86/xen/mmu_pv.c ptl = ptlock_ptr(page); ptlock_ptr 1921 include/linux/mm.h return ptlock_ptr(pmd_page(*pmd)); ptlock_ptr 1936 include/linux/mm.h spin_lock_init(ptlock_ptr(page)); ptlock_ptr 2012 include/linux/mm.h return ptlock_ptr(pmd_to_page(pmd));