diff options
Diffstat (limited to 'include/linux/lguest_bus.h')
| -rw-r--r-- | include/linux/lguest_bus.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/lguest_bus.h b/include/linux/lguest_bus.h index c9b4e05fee4..d27853ddc64 100644 --- a/include/linux/lguest_bus.h +++ b/include/linux/lguest_bus.h @@ -15,11 +15,14 @@ struct lguest_device { void *private; }; -/* By convention, each device can use irq index+1 if it wants to. */ +/*D:380 Since interrupt numbers are arbitrary, we use a convention: each device + * can use the interrupt number corresponding to its index. The +1 is because + * interrupt 0 is not usable (it's actually the timer interrupt). */ static inline int lgdev_irq(const struct lguest_device *dev) { return dev->index + 1; } +/*:*/ /* dma args must not be vmalloced! */ void lguest_send_dma(unsigned long key, struct lguest_dma *dma); |