Man page 9 : kfifo_out_peek

kfifo_out_peek - gets some data from the fifo

kfifo_out_peek( fifo , buf , n );

fifo
    address of the fifo to be used

buf
    pointer to the storage buffer

n
    max. number of elements to get

This macro get the data from the fifo and return the numbers of elements copied. The data is not removed from the fifo.

Note that with only one concurrent reader and one concurrent writer, you donAqt need extra locking to use these macro.