[PATCH] x86_64: clear_bss before set_intr_gate with early_idt_handler

idt_table is in the .bss section, so clear_bss need to called at first

Signed-off-by: Yinghai Lu <yinghai.lu@amd.com>
Signed-off-by: Andi Kleen <ak@suse.de>

1 files changed, 4 insertions, 2 deletions

diff --git a/arch/x86_64/kernel/head64.c b/arch/x86_64/kernel/head64.c
index 9561eb3c5b5c..cc230b93cd1c 100644
--- a/arch/x86_64/kernel/head64.c
+++ b/arch/x86_64/kernel/head64.c
@@ -57,10 +57,12 @@ void __init x86_64_start_kernel(char * real_mode_data)
 {
         int i;
 
-        for (i = 0; i < 256; i++)
+        /* clear bss before set_intr_gate with early_idt_handler */
+        clear_bss();
+
+        for (i = 0; i < IDT_ENTRIES; i++)
                 set_intr_gate(i, early_idt_handler);
         asm volatile("lidt %0" :: "m" (idt_descr));
-        clear_bss();
 
         early_printk("Kernel alive\n");