VServer 1.9.2 (patch-2.6.8.1-vs1.9.2.diff)

[linux-2.6.git] / arch / sh / kernel / irq.c

diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c
index a37e2d1..d78503d 100644 (file)
--- a/arch/sh/kernel/irq.c
+++ b/arch/sh/kernel/irq.c
@@ -436,7 +436,7 @@ int request_irq(unsigned int irq,
 
        action->handler = handler;
        action->flags = irqflags;
-       action->mask = 0;
+       cpus_clear(action->mask);
        action->name = devname;
        action->next = NULL;
        action->dev_id = dev_id;
@@ -575,6 +575,49 @@ unsigned long probe_irq_on(void)
 
 EXPORT_SYMBOL(probe_irq_on);
 
+/* Return a mask of triggered interrupts (this
+ * can handle only legacy ISA interrupts).
+ */
+
+/*
+ *     probe_irq_mask - scan a bitmap of interrupt lines
+ *     @val:   mask of interrupts to consider
+ *
+ *     Scan the ISA bus interrupt lines and return a bitmap of
+ *     active interrupts. The interrupt probe logic state is then
+ *     returned to its previous value.
+ *
+ *     Note: we need to scan all the irq's even though we will
+ *     only return ISA irq numbers - just so that we reset them
+ *     all to a known state.
+ */
+unsigned int probe_irq_mask(unsigned long val)
+{
+       int i;
+       unsigned int mask;
+
+       mask = 0;
+       for (i = 0; i < NR_IRQS; i++) {
+               irq_desc_t *desc = irq_desc + i;
+               unsigned int status;
+
+               spin_lock_irq(&desc->lock);
+               status = desc->status;
+
+               if (status & IRQ_AUTODETECT) {
+                       if (i < 16 && !(status & IRQ_WAITING))
+                               mask |= 1 << i;
+
+                       desc->status = status & ~IRQ_AUTODETECT;
+                       desc->handler->shutdown(i);
+               }
+               spin_unlock_irq(&desc->lock);
+       }
+       up(&probe_sem);
+
+       return mask & val;
+}
+
 int probe_irq_off(unsigned long val)
 {
        int i, irq_found, nr_irqs;