Re: [PATCH] arch/arm64: Add the various compression methods to the default config

From: Will Deacon <will.deacon@arm.com>
To: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de>
Cc: catalin.marinas@arm.com, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] arch/arm64: Add the various compression methods to the default config
Date: Sat, 19 Jan 2019 21:02:23 +0000	[thread overview]
Message-ID: <20190119210221.GA30173@brain-police> (raw)
In-Reply-To: <20190119185540.20526-1-tobias.johannes.klausmann@mni.thm.de>

On Sat, Jan 19, 2019 at 07:55:40PM +0100, Tobias Klausmann wrote:
> There is no reason having arm64 not select these configurations by
> default!
> 
> Signed-off-by: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de>
> ---
>  arch/arm64/Kconfig | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index a4168d366127..91a5e1cd7279 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -140,6 +140,11 @@ config ARM64
>  	select HAVE_GENERIC_DMA_COHERENT
>  	select HAVE_HW_BREAKPOINT if PERF_EVENTS
>  	select HAVE_IRQ_TIME_ACCOUNTING
> +	select HAVE_KERNEL_GZIP
> +	select HAVE_KERNEL_LZ4
> +	select HAVE_KERNEL_LZMA
> +	select HAVE_KERNEL_LZO
> +	select HAVE_KERNEL_XZ
>  	select HAVE_MEMBLOCK_NODE_MAP if NUMA
>  	select HAVE_NMI
>  	select HAVE_PATA_PLATFORM

I don't really understand what this patch achieves. We don't have a built-in
decompressor for arm64, as we defer to the bootloader to handle that for us
instead. The Image.gz target already produces a gzipped kernel payload.

What are you trying to do?

Will

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