linux-kernel - Re: [PATCH] RISC-V: Add multiple compression image format.

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Message-ID: <mhng-cf6b2a66-7749-4816-85a5-41a067eb5c32@palmer-si-x1c4>
Date:   Wed, 06 Nov 2019 09:47:53 -0800 (PST)
From:   Palmer Dabbelt <palmer@...belt.com>
To:     Atish Patra <Atish.Patra@....com>
CC:     linux-kernel@...r.kernel.org, Atish Patra <Atish.Patra@....com>,
        aou@...s.berkeley.edu, anup@...infault.org,
        linux-riscv@...ts.infradead.org,
        Paul Walmsley <paul.walmsley@...ive.com>
Subject:     Re: [PATCH] RISC-V: Add multiple compression image format.

On Tue, 05 Nov 2019 16:06:52 PST (-0800), Atish Patra wrote:
> Currently, there is only support for .gz compression type
> for generating kernel Image.
>
> Add support for other compression methods(lzma, lz4, lzo, bzip2)
> that helps in generating a even smaller kernel image. Image.gz
> will still be the default compressed image.
>
> Signed-off-by: Atish Patra <atish.patra@....com>
> ---
>  arch/riscv/boot/Makefile | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
>
> diff --git a/arch/riscv/boot/Makefile b/arch/riscv/boot/Makefile
> index 0990a9fdbe5d..88356650c992 100644
> --- a/arch/riscv/boot/Makefile
> +++ b/arch/riscv/boot/Makefile
> @@ -24,6 +24,18 @@ $(obj)/Image: vmlinux FORCE
>  $(obj)/Image.gz: $(obj)/Image FORCE
>  	$(call if_changed,gzip)
>
> +$(obj)/Image.bz2: $(obj)/Image FORCE
> +	$(call if_changed,bzip2)
> +
> +$(obj)/Image.lz4: $(obj)/Image FORCE
> +	$(call if_changed,lz4)
> +
> +$(obj)/Image.lzma: $(obj)/Image FORCE
> +	$(call if_changed,lzma)
> +
> +$(obj)/Image.lzo: $(obj)/Image FORCE
> +	$(call if_changed,lzo)
> +
>  install:
>  	$(CONFIG_SHELL) $(srctree)/$(src)/install.sh $(KERNELRELEASE) \
>  	$(obj)/Image System.map "$(INSTALL_PATH)"

Reviewed-by: Palmer Dabbelt <palmer@...belt.com>