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>

1 files changed, 1 insertions, 2 deletions

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 15e05a004fcf..6c3f6eb1f790 100644
--- 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;