Name
kfifo_to_user —
gets data from the FIFO and write it to user space
Synopsis
int fsfunckfifo_to_user ( | struct kfifo * fifo, |
| void __user * to, |
| unsigned int len, |
| unsigned * lenout) ; |
Arguments
fifo
the fifo to be used.
to
where the data must be copied.
len
the size of the destination buffer.
lenout
pointer to output variable with copied data
Description
This function copies at most len
bytes from the FIFO into the
to
buffer and 0 or -EFAULT.
Note that with only one concurrent reader and one concurrent
writer, you don't need extra locking to use these functions.