单选题：Linux处理一个系统调用的控制流程是________。

Linux处理一个系统调用的控制流程是________。@[A](1)
A. system_call -> sys_fork -> do_fork
B. sys_fork -> system_call -> do_fork
C. sys_fork -> do_fork -> system_call
D. do_fork ->sys_fork->system_call




A.system_call -> sys_fork -> do_fork
B.sys_fork -> system_call -> do_fork
C.sys_fork -> do_fork -> system_call
D.do_fork ->sys_fork->system_call


答案：A