---
 mm/vmalloc.c |   22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

Index: linux-2.6/mm/vmalloc.c
===================================================================
--- linux-2.6.orig/mm/vmalloc.c	2007-09-15 19:59:29.000000000 -0700
+++ linux-2.6/mm/vmalloc.c	2007-09-15 20:16:25.000000000 -0700
@@ -369,11 +369,29 @@ static void __vunmap(void *addr, int dea
  *
  *	Must not be called in interrupt context.
  */
-void vfree(void *addr)
+static void vfree_work(struct work_struct *w)
 {
-	BUG_ON(in_interrupt());
+	void *addr = w;
+
 	__vunmap(addr, 1);
 }
+
+void vfree(void *addr)
+{
+	struct work_struct *w = addr;
+
+	if (unlikely(in_interrupt())) {
+		/*
+		 * The object is unused and we have at least a page
+		 * at addr. So we can just use the area to put a work_struct
+		 * there in order to defer the free until a time when
+		 * interrupts are enabled.
+		 */
+		INIT_WORK(w, vfree_work);
+		schedule_work(w);
+	} else
+		vfree_work(w);
+}
 EXPORT_SYMBOL(vfree);
 
 /**