linux-kernel - Re: [PATCH v7 1/5] x86: devicetree: fix config option around x86_flattree_get

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Date:   Sat, 3 Mar 2018 16:27:23 -0800
From:   Frank Rowand <frowand.list@...il.com>
To:     Rob Herring <robh+dt@...nel.org>, pantelis.antoniou@...sulko.com,
        Pantelis Antoniou <panto@...oniou-consulting.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ivan Gorinov <ivan.gorinov@...el.com>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        geert@...ux-m68k.org, laurent.pinchart+renesas@...asonboard.com
Subject: Re: [PATCH v7 1/5] x86: devicetree: fix config option around
 x86_flattree_get_config()

On 03/03/18 16:17, frowand.list@...il.com wrote:
> From: Frank Rowand <frank.rowand@...y.com>
> 
> x86_flattree_get_config() is incorrectly protected by
> ifdef CONFIG_OF_FLATTREE.  It uses of_get_flat_dt_size(), which
> only exists if CONFIG_OF_EARLY_FLATTREE.  This issue has not
> been exposed previously because OF_FLATTREE did not occur unless
> it was selected by OF_EARLY_FLATTREE.  A devicetree overlay change
> is selecting OF_FLATTREE directly instead of indirectly enabling
> it by selecting OF_EARLY_FLATTREE.
> 
> This problem was exposed by a randconfig generated by the kbuild
> test robot, where Platform OLPC was enabled.  OLPC selects
> OF_PROMTREE instead of OF_EARLY_FLATREE.  The only other x86
> platform that selects OF is X86_INTEL_CE, which does select
> OF_EARLY_FLATTREE.
> 
> Signed-off-by: Frank Rowand <frank.rowand@...y.com>
> ---
> 
> x86 Maintainers, please ack this patch for Rob to accept
> 
> This patch previously submitted separately as:
> 
>   "x86: devicetree: fix config option around x86_flattree_get_config()"
>   https://lkml.org/lkml/2018/3/2/1148
> 
> so this is a jump from version 1 to version 6.

                                      ^^^^^^^^^
                                      version 7

> 
> No changes from version 1.
> 
> 
>  arch/x86/kernel/devicetree.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
> index 25de5f6ca997..45416826f6ee 100644
> --- a/arch/x86/kernel/devicetree.c
> +++ b/arch/x86/kernel/devicetree.c
> @@ -259,7 +259,7 @@ static void __init dtb_apic_setup(void)
>  	dtb_ioapic_setup();
>  }
>  
> -#ifdef CONFIG_OF_FLATTREE
> +#ifdef CONFIG_OF_EARLY_FLATTREE
>  static void __init x86_flattree_get_config(void)
>  {
>  	u32 size, map_len;
>