root/rt-thread @ fb3f835089f604bbcb2bec47ba5ed290e7a8a713

Tangyuxin 7f1157e0de [drivers][serial] ioctl add F_SETFL cmd (#5876)		%!s(int64=3) %!d(string=hai) anos
..
SConscript	5ac5d92cbb [serial] 优化发送非阻塞时，serial_close未执行rt_completion_done的问题。	%!s(int64=4) %!d(string=hai) anos
serial.c	7f1157e0de [drivers][serial] ioctl add F_SETFL cmd (#5876)	%!s(int64=3) %!d(string=hai) anos
serial_v2.c	7f1157e0de [drivers][serial] ioctl add F_SETFL cmd (#5876)	%!s(int64=3) %!d(string=hai) anos