> I want to use poll() functionality (to properly handle select()
> and poll() syscalls) in my char-device driver. The code for my
> kernel-side poll() function is (a little bit simplified):
>
> unsigned int my_poll(struct file *filp, struct poll_table_struct
> *wait)
> {
> unsigned int mask=0;
> unsigned long flags;
>
> poll_wait(filp, my_wait_queue, wait);
>
> if ( any_data_available > 0)
> mask |= POLLIN | POLLRDNORM;
>
> return mask;
>}
You have to make sure your process is sleeping on my_wait_queue. Linux kernel
will wake up processes sleeping on my_wait_queue.
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