linux-kernel - Re: [PATCH] efi: ARM: avoid warning about phys_addr

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Message-ID: <20160418211233.GZ2829@codeblueprint.co.uk>
Date:	Mon, 18 Apr 2016 22:12:33 +0100
From:	Matt Fleming <matt@...eblueprint.co.uk>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Will Deacon <will.deacon@....com>,
	Steve Capper <steve.capper@....com>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	David Daney <david.daney@...ium.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Mark Rutland <mark.rutland@....com>,
	Leif Lindholm <leif.lindholm@...aro.org>,
	Dan Williams <dan.j.williams@...el.com>,
	linux-efi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] efi: ARM: avoid warning about phys_addr_t cast

On Mon, 18 Apr, at 10:34:19AM, Arnd Bergmann wrote:
> memblock_remove() takes a phys_addr_t, which may be narrower than 64 bits,
> causing a harmless warning:
> 
> drivers/firmware/efi/arm-init.c: In function 'reserve_regions':
> include/linux/kernel.h:29:20: error: large integer implicitly truncated to unsigned type [-Werror=overflow]
>  #define ULLONG_MAX (~0ULL)
>                     ^
> drivers/firmware/efi/arm-init.c:152:21: note: in expansion of macro 'ULLONG_MAX'
>   memblock_remove(0, ULLONG_MAX);
> 
> This adds an explicit typecast to avoid the warning
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: 500899c2cc3e ("efi: ARM/arm64: ignore DT memory nodes instead of removing them")
> ---
>  drivers/firmware/efi/arm-init.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Will, this one is for you.

Reviewed-by: Matt Fleming <matt@...eblueprint.co.uk>