RT-Thread/rt-thread: https://github.com/RT-Thread/rt-thread.git @ fcb0a47328a3178d02b3bc0a83bd9e84818e08b7

réplica de https://github-proxy.rt-thread.io/RT-Thread/rt-thread.git

Bernard Xiong bccdf912c8 Merge pull request #4764 from KyleChenjh/master		%!s(int64=4) %!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	fbcaa667f8 add sys/ioctl for serial	%!s(int64=4) %!d(string=hai) anos
serial_v2.c	0613cf8ca2 [serial] 解决serial_close未清除回调接口的问题	%!s(int64=4) %!d(string=hai) anos