linux-kernel - Re: [PATCH v2 2/4] linux/const.h: move UL() macro to include/linux/const.h

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Message-ID: <20170105112425.GT14217@n2100.armlinux.org.uk>
Date:   Thu, 5 Jan 2017 11:24:26 +0000
From:   Russell King - ARM Linux <linux@...linux.org.uk>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Mark Rutland <mark.rutland@....com>,
        Nicolas Pitre <nicolas.pitre@...aro.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Will Deacon <will.deacon@....com>,
        David Howells <dhowells@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        Guan Xuetao <gxt@...c.pku.edu.cn>,
        Pratyush Anand <panand@...hat.com>, x86@...nel.org,
        Ingo Molnar <mingo@...hat.com>,
        Laura Abbott <labbott@...hat.com>,
        Neeraj Upadhyay <neeraju@...eaurora.org>,
        Alexander Popov <alex.popov@...ux.com>,
        Arnd Bergmann <arnd@...db.de>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-arm-kernel@...ts.infradead.org,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        linux-kernel@...r.kernel.org, James Morse <james.morse@....com>,
        Olof Johansson <olof@...om.net>
Subject: Re: [PATCH v2 2/4] linux/const.h: move UL() macro to
 include/linux/const.h

On Thu, Jan 05, 2017 at 11:20:07AM +0900, Masahiro Yamada wrote:
> ARM, ARM64 and UniCore32 duplicate the definition of UL():
> 
>   #define UL(x) _AC(x, UL)
> 
> This is not actually arch-specific, so it will be useful to move it
> to a common header.  Currently, we only have the uapi variant for
> linux/const.h, so I am creating include/linux/const.h.
> 
> I am also adding _UL(), _ULL() and ULL() because _AC() is mostly
> used in the form either _AC(..., UL) or _AC(..., ULL).  I expect
> they will be replaced in later cleanups.  The underscore-prefixed
> ones should be used for exported headers.
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
> Acked-by: Guan Xuetao <gxt@...c.pku.edu.cn>
> ---
> 
> Changes in v2: None
> 
>  arch/arm/include/asm/memory.h       | 6 ------
>  arch/arm64/include/asm/memory.h     | 6 ------
>  arch/unicore32/include/asm/memory.h | 6 ------
>  include/linux/const.h               | 9 +++++++++
>  include/uapi/linux/const.h          | 9 ++++++---
>  5 files changed, 15 insertions(+), 21 deletions(-)
>  create mode 100644 include/linux/const.h
> 
> diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
> index 76cbd9c..7558247 100644
> --- a/arch/arm/include/asm/memory.h
> +++ b/arch/arm/include/asm/memory.h
> @@ -22,12 +22,6 @@
>  #include <mach/memory.h>
>  #endif
>  
> -/*
> - * Allow for constants defined here to be used from assembly code
> - * by prepending the UL suffix only with actual C code compilation.
> - */
> -#define UL(x) _AC(x, UL)
> -
>  /* PAGE_OFFSET - the virtual address of the start of the kernel image */
>  #define PAGE_OFFSET		UL(CONFIG_PAGE_OFFSET)
>  

For ARM,

Acked-by: Russell King <rmk+kernel@...linux.org.uk>

Thanks.

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
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