[PATCH] x86-64: Don't trust boot_cpu_id in the mptable.

It could be wrong for kexec or other cases. Read it from
the CPU instead.

Signed-off-by: Murali <muralim@in.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/x86_64/kernel/apic.c b/arch/x86_64/kernel/apic.c
index 12e9d6c..a759f4e 100644 (file)
--- a/arch/x86_64/kernel/apic.c
+++ b/arch/x86_64/kernel/apic.c
@@ -622,8 +622,7 @@ void __init init_apic_mappings(void)
         * Fetch the APIC ID of the BSP in case we have a
         * default configuration (or the MP table is broken).
         */
         * Fetch the APIC ID of the BSP in case we have a
         * default configuration (or the MP table is broken).
         */

-       if (boot_cpu_id == -1U)
-               boot_cpu_id = GET_APIC_ID(apic_read(APIC_ID));
+       boot_cpu_id = GET_APIC_ID(apic_read(APIC_ID));

 
 #ifdef CONFIG_X86_IO_APIC
        {
 
 #ifdef CONFIG_X86_IO_APIC
        {