RT-Thread/rt-thread: https://github.com/RT-Thread/rt-thread.git @ ac032ad07fa280477d785c41bdedbd2b68d81517

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weety 624d947e56 use __rt_ffs instead of ffs		12 سال پیش
..
drivers	624d947e56 use __rt_ffs instead of ffs	12 سال پیش
rtdevice.h	639bd30321 reimplement ringbuffer	12 سال پیش