Interrupt handling - Linux

[manty kuma]

In linux interrupt programming, we do request_irq(...) in this function,
the first argument is irq number. If i am not wrong, this is the interrupt
line that we are requesting from kernel. For one particular hardware, is
this IRQ line fixed or can it register on any line based on the
availability? The concept is not clear. Kindly explain. Also, when i do
interrupt programming for AVR or ARM, all the peripherals are having fixed
IRQ numbers. and they are having handlers. There is no concept of interrupt
lines as such. So my second question is how are IRQ lines and IRQ numbers
related?

Thanks,
Sandeep
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20121128/04f2e526/attachment.html