linux-kernel - Re: [PATCH] MIPS: Fix duplicate instances of ARCH_SPARSEMEM

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Date:	Mon, 30 Jan 2012 09:03:04 -0800
From:	David Daney <ddaney.cavm@...il.com>
To:	Kevin Cernekee <cernekee@...il.com>
CC:	Ralf Baechle <ralf@...ux-mips.org>,
	David Daney <ddaney@...iumnetworks.com>,
	linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] MIPS: Fix duplicate instances of ARCH_SPARSEMEM_ENABLE

On 01/28/2012 03:07 PM, Kevin Cernekee wrote:
> "config ARCH_SPARSEMEM_ENABLE" exists in both arch/mips/Kconfig and
> arch/mips/cavium-octeon/Kconfig, but the dependencies are not the same.
> This results in warnings when a non-Cavium platform tries to select
> ARCH_SPARSEMEM_ENABLE:
>
>      $ make lemote2f_defconfig ARCH=mips
>      warning: (LEMOTE_FULOONG2E&&  LEMOTE_MACH2F) selects ARCH_SPARSEMEM_ENABLE which has unmet direct dependencies (CPU_CAVIUM_OCTEON)
>      warning: (LEMOTE_FULOONG2E&&  LEMOTE_MACH2F) selects ARCH_SPARSEMEM_ENABLE which has unmet direct dependencies (CPU_CAVIUM_OCTEON)
>      #
>      # configuration written to .config
>      #
>
> Proposed workaround is to use a Cavium-specific config option which
> "select"s the desired options.
>
> Signed-off-by: Kevin Cernekee<cernekee@...il.com>
> ---
>   arch/mips/cavium-octeon/Kconfig |    3 ++-
>   1 files changed, 2 insertions(+), 1 deletions(-)
>
> diff --git a/arch/mips/cavium-octeon/Kconfig b/arch/mips/cavium-octeon/Kconfig
> index f9e275a..eda8266 100644
> --- a/arch/mips/cavium-octeon/Kconfig
> +++ b/arch/mips/cavium-octeon/Kconfig
> @@ -82,8 +82,9 @@ config CAVIUM_OCTEON_LOCK_L2_MEMCPY
>   	help
>   	  Lock the kernel's implementation of memcpy() into L2.
>
> -config ARCH_SPARSEMEM_ENABLE
> +config CAVIUM_OCTEON_SPARSEMEM_ENABLE
>   	def_bool y
> +	select ARCH_SPARSEMEM_ENABLE
>   	select SPARSEMEM_STATIC
>
>   config IOMMU_HELPER

NAK!

A cleaner patch for this was already done here:

http://patchwork.linux-mips.org/patch/3285/
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