linux-kernel - Re: [PATCHv2 2/7] acpi: change the topo of acpi_table

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Message-ID: <CAFgQCTsMo9+8m9jxUK5Eax44rsY+a3TBpb4HsUrScJW3OQ18Kw@mail.gmail.com>
Date:   Tue, 15 Jan 2019 15:28:19 +0800
From:   Pingfan Liu <kernelfans@...il.com>
To:     Dave Hansen <dave.hansen@...el.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>, Yinghai Lu <yinghai@...nel.org>,
        Tejun Heo <tj@...nel.org>, Chao Fan <fanc.fnst@...fujitsu.com>,
        Baoquan He <bhe@...hat.com>, Juergen Gross <jgross@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Michal Hocko <mhocko@...e.com>, x86@...nel.org,
        linux-acpi@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCHv2 2/7] acpi: change the topo of acpi_table_upgrade()

On Tue, Jan 15, 2019 at 7:12 AM Dave Hansen <dave.hansen@...el.com> wrote:
>
> On 1/10/19 9:12 PM, Pingfan Liu wrote:
> > The current acpi_table_upgrade() relies on initrd_start, but this var is
>
> "var" meaning variable?
>
> Could you please go back and try to ensure you spell out all the words
> you are intending to write?  I think "topo" probably means "topology",
> but it's a really odd word to use for changing the arguments of a
> function, so I'm not sure.
>
> There are a couple more of these in this set.
>
Yes. I will do it and fix them in next version.

> > only valid after relocate_initrd(). There is requirement to extract the
> > acpi info from initrd before memblock-allocator can work(see [2/4]), hence
> > acpi_table_upgrade() need to accept the input param directly.
>
> "[2/4]"
>
> It looks like you quickly resent this set without updating the patch
> descriptions.
>
> > diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
> > index 61203ee..84e0a79 100644
> > --- a/drivers/acpi/tables.c
> > +++ b/drivers/acpi/tables.c
> > @@ -471,10 +471,8 @@ static DECLARE_BITMAP(acpi_initrd_installed, NR_ACPI_INITRD_TABLES);
> >
> >  #define MAP_CHUNK_SIZE   (NR_FIX_BTMAPS << PAGE_SHIFT)
> >
> > -void __init acpi_table_upgrade(void)
> > +void __init acpi_table_upgrade(void *data, size_t size)
> >  {
> > -     void *data = (void *)initrd_start;
> > -     size_t size = initrd_end - initrd_start;
> >       int sig, no, table_nr = 0, total_offset = 0;
> >       long offset = 0;
> >       struct acpi_table_header *table;
>
> I know you are just replacing some existing variables, but we have a
> slightly higher standard for naming when you actually have to specify
> arguments to a function.  Can you please give these proper names?
>
OK, I will change it to acpi_table_upgrade(void *initrd, size_t size).

Thanks,
Pingfan