PTRS_PER_PTE 121 arch/x86/include/asm/fixmap.h -PTRS_PER_PTE PTRS_PER_PTE 546 arch/x86/include/asm/pgtable.h return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1); PTRS_PER_PTE 849 arch/x86/include/asm/pgtable.h #define PTE_SHIFT ilog2(PTRS_PER_PTE)