From c914846be66fa2750388925a4a655f033d08f1f0 Mon Sep 17 00:00:00 2001
From: David Schleef <ds@schleef.org>
Date: Mon, 13 Aug 2001 10:23:35 +0000
Subject: [PATCH] Initial priority IRQ support

---
 comedi/Makefile |  2 ++
 comedi/rt.c     | 39 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+)

diff --git a/comedi/Makefile b/comedi/Makefile
index dce14283..f911ec9b 100644
--- a/comedi/Makefile
+++ b/comedi/Makefile
@@ -13,9 +13,11 @@ ifneq ($(CONFIG_COMEDI_KLIB),)
 endif
 
 ifeq ($(CONFIG_COMEDI_RT),y)
+  ifneq ($(CONFIG_COMEDI_PIRQ),y)
 	MOD_SUB_DIRS += rt_pend_tq
 	SUB_DIRS += rt_pend_tq
 	EXTRA_OBJS := rt_pend_tq/rt_pend_tq.o
+  endif
 endif
 
 MOD_LIST_NAME := MISC_MODULES
diff --git a/comedi/rt.c b/comedi/rt.c
index b481a52c..f382a54a 100644
--- a/comedi/rt.c
+++ b/comedi/rt.c
@@ -59,6 +59,12 @@
 #define RT_spin_unlock_irq(x)	do{rtl_spin_unlock(x);RT_unprotect();}while(0)
 #endif
 
+#ifdef CONFIG_PRIORITY_IRQ
+#define RT_protect()	__local_irq_disable()
+#define RT_unprotect()	__local_irq_enable()
+#define RT_spin_lock_irq(x)	spin_lock_hard_irq(x)
+#define RT_spin_unlock_irq(x)	spin_unlock_hard_irq(x)
+#endif
 
 struct comedi_irq_struct {
 	int rt;
@@ -346,4 +352,37 @@ void comedi_rt_cleanup(void)
 
 #endif
 
+#ifdef CONFIG_COMEDI_PIRQ
+static int rt_get_irq(struct comedi_irq_struct *it)
+{
+	int ret;
+
+	free_irq(it->irq,it->dev_id);
+	ret=request_irq(it->irq,it->handler,it->flags|SA_PRIORITY,
+		it->device,it->dev_id);
+
+	return ret;
+}
+
+static int rt_release_irq(struct comedi_irq_struct *it)
+{
+	int ret;
+
+	free_irq(it->irq,it->dev_id);
+	ret=request_irq(it->irq,it->handler,it->flags,
+		it->device,it->dev_id);
+
+	return ret;
+}
+
+void comedi_rt_init(void)
+{
+	//rt_pend_tq_init();
+}
+
+void comedi_rt_cleanup(void)
+{
+	//rt_pend_tq_cleanup();
+}
+#endif
 
-- 
2.26.2