Hi, We often have a case where a driver wants to access its data structure in process context as well as in interrupt context (in its ISR). In such scenarios, we generally use spin_lock_irqsave() to grab the lock as well as disable all the local interrupts. AFAIK, disabling of local interrupts is required so as to avoid running your ISR (which needs the lock) while process context is holding the lock. However, this also disables any other ISRs (which DO NOT need the lock) on the local processor. Isn't this sub-optimal? Shouldn't there be a finer grained locking? I was wondering if it is possible to have a spin lock API that grabs the lock and disables ONLY the specified irq on the local processor? Am I missing something here? Rajat -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
