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initramfs: update help text

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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
This commit is contained in:
Thomas Petazzoni 2010-06-26 00:02:28 +02:00 committed by Peter Korsgaard
parent 93e8014709
commit c2a44f158e
1 changed files with 13 additions and 11 deletions
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24
fs/initramfs/Config.in
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@ -2,17 +2,19 @@ config BR2_TARGET_ROOTFS_INITRAMFS
bool "initramfs for initial ramdisk of linux kernel"
depends on BR2_LINUX_KERNEL
help
Build a file which is usable for the gen_init_cpio tool
at linux kernel build.
This file is normally called initramfs_list and can be
generated with gen_initramfs_list.sh script from the root
directory structure.
The file is then used in the kernel build process to generate
the cpio filesystem for the initial ramdisk. Make sure that
you configure this file in kernel build configuration.
The location in the kernel build configuration menu is
Device Drivers -> Block devices -> Initramfs source file(s).
The configuration variable is CONFIG_INITRAMFS_SOURCE
Integrate the root filesystem generated by Buildroot as an
initramfs inside the kernel image. This integration will
take place automatically.
The rootfs.initramfs file generated in the images/ directory
is only a text file describing the contents of the initramfs
in a format understood by the CONFIG_INITRAMFS_SOURCE kernel
configuration option.
Note that enabling initramfs together with other filesystem
formats doesn't make sense: you would end up having two
identical root filesystems, one embedded inside the kernel
image, and one separatly.
comment "initramfs requires a Linux kernel to be built"
depends on !BR2_LINUX_KERNEL