Hi all, I read that "ISR can't have arguments because actually there is no caller in the case of interrupts who passes the arguments. But linux has interrupt handler arguments, by way of some assembler trick ,assigning a bit of code to every possible interrupt." Reading from theory,I have some questions(may be dumb) regarding that. Assuming i have an IRQ number shared by 2 drivers, who registered it with 2 different handlers and 2 different dev_id pointer Now when the interrupt occurs , how will the kernel know the correct dev_id pointer to pass to the interrupt handler? I also read that there should be a hardware assisted mechanism like status register to know which device actually caused the interrupt. Then what is the exact role of dev_id pointer in the case of shared interrupts? Is it possible for me to tryout request_irq and interrupt handling ,practically by writing a small piece of code on my Celeron PC? Thanks for any help. mugunthan -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
