static inline pte_t __ptep_modify_prot_start(struct mm_struct *mm,
					     unsigned long addr,
					     pte_t *ptep)
{
	/*
	 * Get the current pte state, but zero it out to make it
	 * non-present, preventing the hardware from asynchronously
	 * updating it.
	 */
	return ptep_get_and_clear(mm, addr, ptep);
}
Unknown