linux-kernel - Re: [PATCHv2 2/2] arm: Get rid of meminfo

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Message-ID: <CACxGe6vyuZTuMx_posAyu335D3FnFRro24bHR-HNKzG2AuOwDQ@mail.gmail.com>
Date:	Mon, 10 Feb 2014 21:58:20 +0000
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Laura Abbott <lauraa@...eaurora.org>
Cc:	Russell King <linux@....linux.org.uk>,
	David Brown <davidb@...eaurora.org>,
	Daniel Walker <dwalker@...o99.com>,
	Jason Cooper <jason@...edaemon.net>,
	Andrew Lunn <andrew@...n.ch>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Eric Miao <eric.y.miao@...il.com>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Ben Dooks <ben-linux@...ff.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
	Leif Lindholm <leif.lindholm@...aro.org>,
	Grygorii Strashko <grygorii.strashko@...com>,
	Catalin Marinas <catalin.marinas@....com>,
	Rob Herring <robherring2@...il.com>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	Will Deacon <will.deacon@....com>,
	Nicolas Pitre <nicolas.pitre@...aro.org>,
	Santosh Shilimkar <santosh.shilimkar@...com>
Subject: Re: [PATCHv2 2/2] arm: Get rid of meminfo

On Wed, Feb 5, 2014 at 12:02 AM, Laura Abbott <lauraa@...eaurora.org> wrote:
> memblock is now fully integrated into the kernel and is the prefered
> method for tracking memory. Rather than reinvent the wheel with
> meminfo, migrate to using memblock directly instead of meminfo as
> an intermediate.
>
> Signed-off-by: Laura Abbott <lauraa@...eaurora.org>
> ---
> diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
> index b0df976..b6de661 100644
> --- a/arch/arm/kernel/setup.c
> +++ b/arch/arm/kernel/setup.c
> @@ -625,15 +625,8 @@ void __init dump_machine_table(void)
>
>  int __init arm_add_memory(u64 start, u64 size)
>  {
> -       struct membank *bank = &meminfo.bank[meminfo.nr_banks];
>         u64 aligned_start;

With the changes to this function, I think you can outright remove
early_init_dt_add_memory_arch() from arch/arm/kernel/devtree.c. The
default implementation (__weak) in drivers/of/fdt.c uses memblock
directly.

g.
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