2.3.49

 kernel

diff -u --recursive --new-file v2.3.48/linux/kernel/resource.c linux/kernel/resource.c
--- v2.3.48/linux/kernel/resource.c   Wed Dec 15 10:43:17 1999
+++ linux/kernel/resource.c   Tue Feb 29 15:28:46 2000
@@ -92,17 +92,7 @@
    }
 }
 
-int request_resource(struct resource *root, struct resource *new)
-{
-   struct resource *conflict;
-
-   write_lock(&resource_lock);
-   conflict = __request_resource(root, new);
-   write_unlock(&resource_lock);
-   return conflict ? -EBUSY : 0;
-}
-
-int release_resource(struct resource *old)
+static int __release_resource(struct resource *old)
 {
    struct resource *tmp, **p;
 
@@ -119,6 +109,40 @@
       p = &tmp->sibling;
    }
    return -EINVAL;
+}
+
+int request_resource(struct resource *root, struct resource *new)
+{
+   struct resource *conflict;
+
+   write_lock(&resource_lock);
+   conflict = __request_resource(root, new);
+   write_unlock(&resource_lock);
+   return conflict ? -EBUSY : 0;
+}
+
+int release_resource(struct resource *old)
+{
+   int retval;
+
+   write_lock(&resource_lock);
+   retval = __release_resource(old);
+   write_unlock(&resource_lock);
+   return retval;
+}
+
+int check_resource(struct resource *root, unsigned long start, unsigned long len)
+{
+   struct resource *conflict, tmp;
+
+   tmp.start = start;
+   tmp.end = start + len - 1;
+   write_lock(&resource_lock);
+   conflict = __request_resource(root, &tmp);
+   if (!conflict)
+      __release_resource(&tmp);
+   write_unlock(&resource_lock);
+   return conflict ? -EBUSY : 0;
 }
 
 /*