[PATCH] x86_64: not clear empty_zero_page again

[Yinghai Lu]

[PATCH] x86_64: 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@xxxxxxx>

Index: linux-2.6/arch/x86/mm/init_64.c
===================================================================
--- linux-2.6.orig/arch/x86/mm/init_64.c
+++ linux-2.6/arch/x86/mm/init_64.c
@@ -521,8 +521,7 @@ 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;
 
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