* Yinghai Lu <[email protected]> wrote:
> Impact: fix boot with mptable above max_low_mapped
>
> try to use early_ioremap it.
>
> v2: also get the exact size for reserve_bootmem in case we got big size than
> 4k
>
> Signed-off-by: Yinghai Lu <[email protected]>
> Reported-and-tested-by: Kevin O'Connor <[email protected]>
>
> ---
> arch/x86/kernel/mpparse.c | 20 ++++++++++++++++++--
> 1 file changed, 18 insertions(+), 2 deletions(-)
>
> Index: linux-2.6/arch/x86/kernel/mpparse.c
> ===================================================================
> --- linux-2.6.orig/arch/x86/kernel/mpparse.c
> +++ linux-2.6/arch/x86/kernel/mpparse.c
> @@ -611,12 +611,20 @@ static void __init __get_smp_config(unsi
> construct_default_ISA_mptable(mpf->feature1);
>
> } else if (mpf->physptr) {
> + struct mpc_table *mpc;
> + unsigned long size;
>
> + mpc = early_ioremap(mpf->physptr, PAGE_SIZE);
> + size = mpc->length;
> + apic_printk(APIC_VERBOSE, " mpc: %lx-%lx\n", (unsigned
> long)mpf->physptr,
> + mpf->physptr + size);
> + early_iounmap(mpc, PAGE_SIZE);
> + mpc = early_ioremap(mpf->physptr, size);
no objections, but this bit of __get_smp_config() needs to be
done cleaner - the whole mpf->physptr != 0 bit should probably
go into a helper function.
Ingo
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