[PATCH] [25/45] x86_64: remove sync_Arb_IDs

Andi Kleen
2007-09-21T20:53:14Z

From: Yinghai Lu <Yinghai.Lu@Sun.COM>
[PATCH] x86_64: remove sync_Arb_IDs

i386 code said
/*
* Unsupported on P4 - see Intel Dev. Manual Vol. 3, Ch. 8.6.1 And not
* needed on AMD.
*/
So we don't need sync_Arb_IDs for x86_64...

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

---
arch/x86_64/kernel/apic.c | 17 -----------------
arch/x86_64/kernel/io_apic.c | 1 -
2 files changed, 18 deletions(-)

Index: linux/arch/x86_64/kernel/apic.c
===================================================================
--- linux.orig/arch/x86_64/kernel/apic.c
+++ linux/arch/x86_64/kernel/apic.c
@@ -283,23 +283,6 @@ int __init verify_local_APIC(void)
return 1;
}

-void __init sync_Arb_IDs(void)
-{
- /* Unsupported on P4 - see Intel Dev. Manual Vol. 3, Ch. 8.6.1 */
- unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR));
- if (ver >= 0x14) /* P4 or higher */
- return;
-
- /*
- * Wait for idle.
- */
- apic_wait_icr_idle();
-
- apic_printk(APIC_DEBUG, "Synchronizing Arb IDs.\n");
- apic_write(APIC_ICR, APIC_DEST_ALLINC | APIC_INT_LEVELTRIG
- | APIC_DM_INIT);
-}
-
/*
* An initial setup of the virtual wire mode.
*/
Index: linux/arch/x86_64/kernel/io_apic.c
===================================================================
--- linux.orig/arch/x86_64/kernel/io_apic.c
+++ linux/arch/x86_64/kernel/io_apic.c
@@ -1784,7 +1784,6 @@ void __init setup_IO_APIC(void)

apic_printk(APIC_VERBOSE, "ENABLING IO-APIC IRQs\n");

- sync_Arb_IDs();
setup_IO_APIC_irqs();
init_IO_APIC_traps();
check_timer();