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authorRusty Russell <rusty@rustcorp.com.au>2007-07-26 10:41:03 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-26 11:35:17 -0700
commite2c9784325490c878b7f69aeec1bed98b288bd97 (patch)
treed474007607c713a30db818107ca0581269f059a2 /include/linux/lguest_bus.h
parentb2b47c214f4e85ce3968120d42e8b18eccb4f4e3 (diff)
lguest: documentation III: Drivers
Documentation: The Drivers Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/lguest_bus.h')
-rw-r--r--include/linux/lguest_bus.h5
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);