do_sys_open 1211 fs/compat.c return do_sys_open(AT_FDCWD, filename, flags, mode); do_sys_open 1221 fs/compat.c return do_sys_open(dfd, filename, flags, mode); do_sys_open 1039 fs/open.c ret = do_sys_open(AT_FDCWD, filename, flags, mode); do_sys_open 1053 fs/open.c ret = do_sys_open(dfd, filename, flags, mode); do_sys_open 1689 include/linux/fs.h extern long do_sys_open(int dfd, const char __user *filename, int flags,