[PATCH] x86_64 write apic id fix

[Vivek Goyal]

o Apic id is in most significant 8 bits of APIC_ID register. Current code
  is trying to write apic id to least significant 8 bits. This patch fixes
  it.

o This fix enables booting uni kdump capture kernel on a cpu with non-zero
  apic id.

Signed-off-by: Vivek Goyal <vgoyal@xxxxxxxxxx>
---


diff -puN arch/x86_64/kernel/apic.c~kdump-up-kernel-non-boot-cpu-fix arch/x86_64/kernel/apic.c
--- linux-2.6.15-rc5-mm3-16M/arch/x86_64/kernel/apic.c~kdump-up-kernel-non-boot-cpu-fix	2005-12-27 10:38:09.000000000 -0800
+++ linux-2.6.15-rc5-mm3-16M-root/arch/x86_64/kernel/apic.c	2005-12-27 10:39:31.000000000 -0800
@@ -1060,7 +1060,7 @@ int __init APIC_init_uniprocessor (void)
 	connect_bsp_APIC();
 
 	phys_cpu_present_map = physid_mask_of_physid(boot_cpu_id);
-	apic_write_around(APIC_ID, boot_cpu_id);
+	apic_write_around(APIC_ID, SET_APIC_ID(boot_cpu_id));
 
 	setup_local_APIC();
 
diff -puN include/asm-x86_64/apicdef.h~kdump-up-kernel-non-boot-cpu-fix include/asm-x86_64/apicdef.h
--- linux-2.6.15-rc5-mm3-16M/include/asm-x86_64/apicdef.h~kdump-up-kernel-non-boot-cpu-fix	2005-12-27 10:38:25.000000000 -0800
+++ linux-2.6.15-rc5-mm3-16M-root/include/asm-x86_64/apicdef.h	2005-12-27 10:39:02.000000000 -0800
@@ -13,6 +13,7 @@
 #define		APIC_ID		0x20
 #define			APIC_ID_MASK		(0xFFu<<24)
 #define			GET_APIC_ID(x)		(((x)>>24)&0xFFu)
+#define			SET_APIC_ID(x)		(((x)<<24))
 #define		APIC_LVR	0x30
 #define			APIC_LVR_MASK		0xFF00FF
 #define			GET_APIC_VERSION(x)	((x)&0xFFu)
_
-
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