do_mmap 56 arch/x86/mm/mpx.c addr = do_mmap(NULL, 0, len, PROT_READ | PROT_WRITE, do_mmap 2345 include/linux/mm.h extern unsigned long do_mmap(struct file *file, unsigned long addr, do_mmap 2360 include/linux/mm.h return do_mmap(file, addr, len, prot, flags, 0, pgoff, populate, uf);