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    SubjectRe: [PATCH] i386-pda: Initialize the PDA early, before any C code runs.

    * Jeremy Fitzhardinge <> wrote:

    > Jeremy Fitzhardinge wrote:
    > >Not sure, but I think this replicates the behaviour of the original
    > >code (ie, INIT_THREAD_INFO initializes cpu to 0, so smp_processor_id
    > >will return 0). Hm, Voyager will probably need a little patch to
    > >update the the PDA cpu_number properly in smp_setup_processor_id().
    > Something like this, perhaps:
    > Subject: set the boot CPU number in the boot_pda
    > Signed-off-by: Jeremy Fitzhardinge <>

    > +++ b/arch/i386/mach-voyager/voyager_smp.c Mon Sep 11 16:34:09 2006

    > smp_setup_processor_id(void)
    > {
    > current_thread_info()->cpu = hard_smp_processor_id();
    > -}
    > + write_pda(cpu_number, hard_smp_processor_id());
    > +}

    yeah. On all other x86 SMP platforms we use the logical APIC ID 0 for
    the boot CPU. (the physical ID might be different, but that doesnt

    NOTE: you'll also need to patch smp_voyager.c:find_smp_config(), where
    it sets current_thread_info()->cpu to boot_cpu_id.

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