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Subject[PATCH 1/14] kexec: i8259-shutdown.i386
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This patch disables interrupt generation from the legacy
pic on reboot. Now that there is a sys_device class it should
not be called while drivers are still using interrupts.

diff -uNr linux-2.6.8.1-mm2/arch/i386/kernel/i8259.c linux-2.6.8.1-mm2-i8259-shutdown.i386/arch/i386/kernel/i8259.c
--- linux-2.6.8.1-mm2/arch/i386/kernel/i8259.c Fri Aug 20 09:56:25 2004
+++ linux-2.6.8.1-mm2-i8259-shutdown.i386/arch/i386/kernel/i8259.c Fri Aug 20 10:27:35 2004
@@ -270,10 +270,22 @@
return 0;
}

+static int i8259A_shutdown(struct sys_device *dev)
+{
+ /* Put the i8259A into a quiescent state that
+ * the kernel initialization code can get it
+ * out of.
+ */
+ outb(0xff, 0x21); /* mask all of 8259A-1 */
+ outb(0xff, 0xA1); /* mask all of 8259A-1 */
+ return 0;
+}
+
static struct sysdev_class i8259_sysdev_class = {
set_kset_name("i8259"),
.suspend = i8259A_suspend,
.resume = i8259A_resume,
+ .shutdown = i8259A_shutdown,
};

static struct sys_device device_i8259A = {
-
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