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>

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 6c3f6eb1f790b74f4ef8075ad734db6281950a7f..05f12c527b0257cf55719124ed9cfa769468cffa 100644 (file)
--- 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 */