x86: not clear empty_zero_page again

empty_zero_page is in .bss section, and it is cleared in clear_bss by
x86_64_start_kernel(). So don't clear that again in mem_init

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
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 15e05a004fcfd67f17cfcc7e78cec3416b92b8e5..6c3f6eb1f790b74f4ef8075ad734db6281950a7f 100644 (file)
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -495,8 +495,7 @@ void __init mem_init(void)
 
        pci_iommu_alloc();
 
-       /* clear the zero-page */
-       memset(empty_zero_page, 0, PAGE_SIZE);
+       /* clear_bss() already clear the empty_zero_page */
 
        reservedpages = 0;