Re: [PATCH v2 06/18] x86, acpi: Initialize ACPI root table list earlier.

Toshi Kani
2013-08-02T16:58:51Z

On Fri, 2013-08-02 at 15:49 +0800, Tang Chen wrote:
> On 08/02/2013 07:54 AM, Toshi Kani wrote:
> ......
> >> /*
> >> + * acpi_root_table_init - Initialize acpi_gbl_root_table_list.
> >> + *
> >> + * This function will parse RSDT or XSDT, find all tables' phys addr,
> >> + * initialize acpi_gbl_root_table_list, and record all tables' phys addr
> >> + * in acpi_gbl_root_table_list.
> >> + */
> >> +void __init acpi_root_table_init(void)
> >
> > I think acpi_root_table_init() is a bit confusing with
> > acpi_boot_table_init(). Perhaps, something like
> > acpi_boot_table_pre_init() or early_acpi_boot_table_init() is better to
> > indicate that this new function is called before acpi_boot_table_init().
> >
>
> OK, will change it to early_acpi_boot_table_init().
>
> >> +{
> >> + dmi_check_system(acpi_dmi_table);
> >> +
> >> + /* If acpi_disabled, bail out */
> >> + if (acpi_disabled)
> >> + return;
> >> +
> >> + /* Initialize the ACPI boot-time table parser */
> >> + if (acpi_table_init()) {
> >> + disable_acpi();
> >> + return;
> >> + }
> >> +}
> >> +
> >> +/*
> >> * acpi_boot_table_init() and acpi_boot_init()
> >> * called from setup_arch(), always.
> >> * 1. checksums all tables
> >> @@ -1511,21 +1533,7 @@ static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
> >>
> >> void __init acpi_boot_table_init(void)
> >
> > The comment of this function needs to be updated. For instance, it
> > describes acpi_table_init(), which you just relocated.
> >
> > * acpi_table_init() is separate to allow reading SRAT without
> > * other side effects.
> > *
>
> Sure. But I don't quite understand this comment. It seems that
> acpi_table_init() has nothing to do with SRAT.
>
> Do you know anything about this ?

Well, I do not know, either. But if I have to guess, it might mean that
"acpi_table_init() is separated from acpi_boot_init() to allow reading
SRAT without the conditional flags, ex. acpi_lapic and acpi_ioapic, in
acpi_boot_init()."

I'd suggest you simply rephrase it to match with your change, instead of
trying to keep such old history.

Thanks,
-Toshi