From 8e2590454c35c71fc997dd06a853234c03fc00a7 Mon Sep 17 00:00:00 2001
From: David Schleef <ds@schleef.org>
Date: Sat, 5 May 2001 11:35:27 +0000
Subject: [PATCH] Added comedi_map, comedi_unmap

---
 comedi/kcomedilib/kcomedilib_main.c | 45 +++++++++++++++++++++++++++++
 comedi/kcomedilib/ksyms.c           |  3 ++
 2 files changed, 48 insertions(+)

diff --git a/comedi/kcomedilib/kcomedilib_main.c b/comedi/kcomedilib/kcomedilib_main.c
index 8ed7fe05..1b359531 100644
--- a/comedi/kcomedilib/kcomedilib_main.c
+++ b/comedi/kcomedilib/kcomedilib_main.c
@@ -944,3 +944,48 @@ int comedi_poll(unsigned int minor, unsigned int subdev)
 	return s->poll(dev,s);
 }
 
+
+/* WARNING: not portable */
+int comedi_map(unsigned int minor, unsigned int subdev, void **ptr)
+{
+	comedi_device *dev;
+	comedi_subdevice *s;
+
+	if((ret=minor_to_dev(minor,&dev))<0)
+		return ret;
+
+	if(subdev>=dev->n_subdevices)
+		return -ENODEV;
+
+	s=dev->subdevices+subdev;
+	if(!s->async)
+		return -EINVAL;
+
+	if(ptr)*ptr=s->async->prealloc_buf;
+
+	/* XXX no reference counting */
+
+	return 0;
+}
+
+/* WARNING: not portable */
+int comedi_unmap(unsigned int minor, unsigned int subdev)
+{
+	comedi_device *dev;
+	comedi_subdevice *s;
+
+	if((ret=minor_to_dev(minor,&dev))<0)
+		return ret;
+
+	if(subdev>=dev->n_subdevices)
+		return -ENODEV;
+
+	s=dev->subdevices+subdev;
+	if(!s->async)
+		return -EINVAL;
+
+	/* XXX no reference counting */
+
+	return 0;
+}
+
diff --git a/comedi/kcomedilib/ksyms.c b/comedi/kcomedilib/ksyms.c
index 8ff0870b..7abd4dff 100644
--- a/comedi/kcomedilib/ksyms.c
+++ b/comedi/kcomedilib/ksyms.c
@@ -62,6 +62,7 @@ EXPORT_SYMBOL(comedi_get_subdevice_type);
 
 EXPORT_SYMBOL(comedi_open);
 EXPORT_SYMBOL(comedi_close);
+EXPORT_SYMBOL(comedi_poll);
 //EXPORT_SYMBOL(comedi_loglevel);
 //EXPORT_SYMBOL(comedi_perror);
 //EXPORT_SYMBOL(comedi_strerror);
@@ -99,6 +100,8 @@ EXPORT_SYMBOL(comedi_dio_bitfield);
 //EXPORT_SYMBOL(comedi_get_timer);
 //EXPORT_SYMBOL(comedi_timed_1chan);
 //EXPORT_SYMBOL(comedi_set_global_oor_behavior);
+EXPORT_SYMBOL(comedi_map);
+EXPORT_SYMBOL(comedi_unmap);
 
 
 #endif
-- 
2.26.2