linux-kernel - Re: [PATCH] x86/boot: fix cast to pointer compiler warning

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Date:   Thu, 09 Jan 2020 23:24:49 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Edwin Zimmerman <edwin@...mainstreet.net>,
        "edwin\@211mainstreet.net" <edwin@...mainstreet.net>,
        x86@...nel.org, Matthew Garrett <mjg59@...gle.com>,
        linux-kernel@...r.kernel.org
Cc:     Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Junichi Nomura <j-nomura@...jp.nec.com>,
        Erik Schmauss <erik.schmauss@...el.com>,
        Josh Boyer <jwboyer@...hat.com>
Subject: Re: [PATCH] x86/boot: fix cast to pointer compiler warning

Edwin Zimmerman <edwin@...mainstreet.net> writes:

> Fix cast-to-pointer compiler warning
>
> arch/x86/boot/compressed/acpi.c: In function 'get_acpi_srat_table':
> arch/x86/boot/compressed/acpi.c:316:9: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
> rsdp = (struct acpi_table_rsdp *)get_cmdline_acpi_rsdp();
>                  ^
>
> Fixes: 41fa1ee9c6d6 ("acpi: Ignore acpi_rsdp kernel param when the kernel has been locked down")
> Signed-off-by: Edwin Zimmerman <edwin@...mainstreet.net>
> ---
>  arch/x86/boot/compressed/acpi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/x86/boot/compressed/acpi.c b/arch/x86/boot/compressed/acpi.c
> index 25019d42ae93..5d2568066d58 100644
> --- a/arch/x86/boot/compressed/acpi.c
> +++ b/arch/x86/boot/compressed/acpi.c
> @@ -313,7 +313,7 @@ static unsigned long get_acpi_srat_table(void)
>       * stash this in boot params because the kernel itself may have
>       * different ideas about whether to trust a command-line parameter.
>       */
> -    rsdp = (struct acpi_table_rsdp *)get_cmdline_acpi_rsdp();
> +    rsdp = (struct acpi_table_rsdp *)(long)get_cmdline_acpi_rsdp();
>  
>      if (!rsdp)
>          rsdp = (struct acpi_table_rsdp *)(long)

  ^^^^^^^^

This is whitespace damaged, please fix your mail setup. Try to send the
patch to yourself and check whether it applies.

Thanks,

        tglx