include/asm/pgtable.h

197  * handle_pte_fault uses pte_present and pte_none to find out the pte type
230  * pte_present is true for the bit pattern .xx.xxxxxx.1, (pte & 0x001) == 0x001
785 static inline int pte_present(pte_t pte)
818 	return pte_present(pte) && !(pte_val(pte) & _PAGE_READ);
878  * pte_present() is true. Undefined behaviour if not..
979  * pte_present() is true. Undefined behaviour if not..
1151 	if (mm_is_protected(mm) && pte_present(res))
1169 	if (mm_is_protected(vma->vm_mm) && pte_present(res))
1195 	if (!mm_is_protected(mm) || !pte_present(res))
1328 	if (pte_present(entry))