__kfifo_len_r     303 include/linux/kfifo.h 	__kfifo_len_r(__kfifo, __recsize); \
__kfifo_len_r     811 include/linux/kfifo.h extern unsigned int __kfifo_len_r(struct __kfifo *fifo, size_t recsize);
__kfifo_len_r     436 lib/kfifo.c    EXPORT_SYMBOL(__kfifo_len_r);