linux-kernel - Re: [PATCH v2 5/5] asm-generic: fix build error in fix_to_virt with CONFIG_DEBUG

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Message-ID: <20180503101920.3157f63f@gandalf.local.home>
Date:   Thu, 3 May 2018 10:19:20 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     "Du, Changbin" <changbin.du@...el.com>
Cc:     yamada.masahiro@...ionext.com, michal.lkml@...kovi.net,
        tglx@...utronix.de, mingo@...hat.com, akpm@...ux-foundation.org,
        rdunlap@...radead.org, x86@...nel.org, lgirdwood@...il.com,
        broonie@...nel.org, arnd@...db.de, linux-kbuild@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [PATCH v2 5/5] asm-generic: fix build error in fix_to_virt with
 CONFIG_DEBUG_EXPERIENCE

On Thu, 3 May 2018 21:25:08 +0800
"Du, Changbin" <changbin.du@...el.com> wrote:

> I think fix_to_virt() is designed for constant idx only. So I think we should
> fix it at the caller side by replacing it with __fix_to_virt().
> 
> --- a/arch/arm/mm/mmu.c
> +++ b/arch/arm/mm/mmu.c
> @@ -1599,7 +1599,7 @@ static void __init early_fixmap_shutdown(void)
>                 pte_t *pte;
>                 struct map_desc map;
> 
> -               map.virtual = fix_to_virt(i);
> +               map.virtual = __fix_to_virt(i);
>                 pte = pte_offset_early_fixmap(pmd_off_k(map.virtual), map.virtual);

That's a better solution than the current patch.

-- Steve