x86: debug: double-check the empty zero page

temporary debugging - remove before this hits v2.6.25.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 6c3f6eb1f790..05f12c527b02 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -497,6 +497,14 @@ void __init mem_init(void)
 
         /* clear_bss() already clear the empty_zero_page */
 
+        /* temporary debugging - double check it's true: */
+        {
+                int i;
+
+                for (i = 0; i < 1024; i++)
+                        WARN_ON_ONCE(empty_zero_page[i]);
+        }
+
         reservedpages = 0;
 
         /* this will put all low memory onto the freelists */