x86: don't set up early exception handlers for external interrupts
All of early setup runs with interrupts disabled, so there is no
need to set up early exception handlers for vectors >= 32
This saves some minor text size.
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: mingo@elte.hu
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index 48be76c..d6d54fa 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -127,7 +127,7 @@
/* Cleanup the over mapped high alias */
cleanup_highmap();
- for (i = 0; i < IDT_ENTRIES; i++) {
+ for (i = 0; i < NUM_EXCEPTION_VECTORS; i++) {
#ifdef CONFIG_EARLY_PRINTK
set_intr_gate(i, &early_idt_handlers[i]);
#else
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index 0172169..2c0abe0 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -278,10 +278,8 @@
.globl early_idt_handlers
early_idt_handlers:
- early_idt_tramp 0, 63
- early_idt_tramp 64, 127
- early_idt_tramp 128, 191
- early_idt_tramp 192, 255
+ .set maxe, NUM_EXCEPTION_VECTORS-1
+ early_idt_tramp 0, maxe
#endif
ENTRY(early_idt_handler)