[PATCH v5 09/11] arm: add support for reserved memory defined by device tree

[Kevin Hilman]

On Fri, Feb 21, 2014 at 4:25 AM, Marek Szyprowski
<m.szyprowski at samsung.com> wrote:
> Enable reserved memory initialization from device tree.
>
> Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>

This patch has hit -next and several legacy (non-DT) boot failures
were detected and bisected down to this patch.  A quick scan looks
like there needs to be some sanity checking whether a DT is even
present.

Kevin

[1] http://lists.linaro.org/pipermail/kernel-build-reports/2014-March/002791.html

>  arch/arm/Kconfig   |    1 +
>  arch/arm/mm/init.c |    2 ++
>  2 files changed, 3 insertions(+)
>
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index e25419817791..d0262bea8020 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -1918,6 +1918,7 @@ config USE_OF
>         select IRQ_DOMAIN
>         select OF
>         select OF_EARLY_FLATTREE
> +       select OF_RESERVED_MEM
>         help
>           Include support for flattened device tree machine descriptions.
>
> diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
> index 804d61566a53..2a77ba8796ae 100644
> --- a/arch/arm/mm/init.c
> +++ b/arch/arm/mm/init.c
> @@ -323,6 +323,8 @@ void __init arm_memblock_init(struct meminfo *mi,
>         if (mdesc->reserve)
>                 mdesc->reserve();
>
> +       early_init_fdt_scan_reserved_mem();
> +
>         /*
>          * reserve memory for DMA contigouos allocations,
>          * must come from DMA area inside low memory
> --
> 1.7.9.5
>
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