xen: unitialised return value in xenbus_write_transaction

[karo-tx-linux.git] / drivers / xen / balloon.c

diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 526c191e84ea9cfd32d0a6252e27046a90cfc6f4..2ba8f95516a0b023c8afce948b757e2884b3cb21 100644 (file)
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -44,13 +44,15 @@
 #include <linux/list.h>
 #include <linux/sysdev.h>
 
-#include <asm/xen/hypervisor.h>
 #include <asm/page.h>
 #include <asm/pgalloc.h>
 #include <asm/pgtable.h>
 #include <asm/uaccess.h>
 #include <asm/tlb.h>
 
+#include <asm/xen/hypervisor.h>
+#include <asm/xen/hypercall.h>
+#include <xen/interface/xen.h>
 #include <xen/interface/memory.h>
 #include <xen/xenbus.h>
 #include <xen/features.h>
@@ -296,6 +298,14 @@ static int decrease_reservation(unsigned long nr_pages)
                frame_list[i] = pfn_to_mfn(pfn);
 
                scrub_page(page);
+
+               if (!PageHighMem(page)) {
+                       ret = HYPERVISOR_update_va_mapping(
+                               (unsigned long)__va(pfn << PAGE_SHIFT),
+                               __pte_ma(0), 0);
+                       BUG_ON(ret);
+                }
+
        }
 
        /* Ensure that ballooned highmem pages don't have kmaps. */