linux-kernel - Re: [Patch] Read CONFIG_RD_ variables for initramfs compression

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Message-Id: <20131029151507.8f63dad8e7525e33431d9596@linux-foundation.org>
Date:	Tue, 29 Oct 2013 15:15:07 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	P J P <ppandit@...hat.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [Patch] Read CONFIG_RD_ variables for initramfs compression

On Tue, 15 Oct 2013 20:25:57 +0530 (IST) P J P <ppandit@...hat.com> wrote:

> When expert configuration option(CONFIG_EXPERT) is enabled,
> menuconfig offers a choice of compression algorithm to compress
> initial ramfs image; This choice is stored into CONFIG_RD_*
> variables. But usr/Makefile uses earlier INITRAMFS_COMPRESSION_*
> macros to build initial ramfs file. Since none of them is defined,
> resulting 'initramfs_data.cpio' file remains un-compressed.
> 
> This patch updates the Makefile to use CONFIG_RD_* variables and
> adds support for LZ4 compression algorithm.

This patch breaks my x86_64 allmodconfig build, because I don't have
the lz4 executable installed:

/usr/src/25/scripts/gen_initramfs_list.sh: line 307: lz4: command not found
make[1]: *** [usr/initramfs_data.cpio.lz4] Error 1

This obviously isn't acceptable!
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