Author: rwatson
Date: Mon May 18 14:02:55 2009
New Revision: 192305
URL: http://svn.freebsd.org/changeset/base/192305
Log:
Binding interrupts to a CPU consists of two parts: setting up CPU
affinity for the interrupt thread, and requesting that underlying
hardware direct interrupts to the CPU. For software interrupt
threads, implement a no-op interrupt event binder that returns
success, so that the interrupt management code will just set the
ithread's affinity and succeed.
Reviewed by: jhb
MFC after: 1 week
Modified:
head/sys/kern/kern_intr.c
Modified: head/sys/kern/kern_intr.c
==============================================================================
--- head/sys/kern/kern_intr.c Mon May 18 12:03:43 2009 (r192304)
+++ head/sys/kern/kern_intr.c Mon May 18 14:02:55 2009 (r192305)
@@ -968,6 +968,18 @@ intr_event_schedule_thread(struct intr_e
#endif
/*
+ * Allow interrupt event binding for software interrupt handlers -- a no-op,
+ * since interrupts are generated in software rather than being directed by
+ * a PIC.
+ */
+static int
+swi_assign_cpu(void *arg, u_char cpu)
+{
+
+ return (0);
+}
+
+/*
* Add a software interrupt handler to a specified event. If a given event
* is not specified, then a new event is created.
*/
@@ -988,7 +1000,7 @@ swi_add(struct intr_event **eventp, cons
return (EINVAL);
} else {
error = intr_event_create(&ie, NULL, IE_SOFT, 0,
- NULL, NULL, NULL, NULL, "swi%d:", pri);
+ NULL, NULL, NULL, swi_assign_cpu, "swi%d:", pri);
if (error)
return (error);
if (eventp != NULL)
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