x86: Force !in_irq() in machine_restart().

Various function we may call assert this fact. We just want to restart
the system.

Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
xen-unstable changeset:   21550:cb75117829a6
xen-unstable date:        Mon Jun 07 16:41:19 2010 +0100

2 files changed, 7 insertions, 5 deletions

diff --git a/xen/arch/x86/shutdown.c b/xen/arch/x86/shutdown.c
index 15f5988af7..6466df4ee8 100644
--- a/xen/arch/x86/shutdown.c
+++ b/xen/arch/x86/shutdown.c
@@ -316,6 +316,13 @@ void machine_restart(unsigned int delay_millisecs)
             halt();
     }
 
+    /*
+     * We may be called from an interrupt context, and various functions we
+     * may need to call (alloc_domheap_pages, map_domain_page, ...) assert that
+     * they are not called from interrupt context. This hack keeps them happy.
+     */
+    local_irq_count(0) = 0;
+
     smp_send_stop();
 
     mdelay(delay_millisecs);
diff --git a/xen/arch/x86/tboot.c b/xen/arch/x86/tboot.c
index 9cbed0b09f..9e0205b738 100644
--- a/xen/arch/x86/tboot.c
+++ b/xen/arch/x86/tboot.c
@@ -334,11 +334,6 @@ void tboot_shutdown(uint32_t shutdown_type)
 
     local_irq_disable();
 
-    /* we may be called from an interrupt context, so to prevent */
-    /* 'ASSERT(!in_irq());' in alloc_domheap_pages(), decrease count */
-    while ( in_irq() )
-        irq_exit();
-
     /* Create identity map for tboot shutdown code. */
     /* do before S3 integrity because mapping tboot may change xenheap */
     map_base = PFN_DOWN(g_tboot_shared->tboot_base);