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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" bool "initramfs for initial ramdisk of linux kernel"
depends on BR2_LINUX_KERNEL depends on BR2_LINUX_KERNEL
help help
Build a file which is usable for the gen_init_cpio tool Integrate the root filesystem generated by Buildroot as an
at linux kernel build. initramfs inside the kernel image. This integration will
This file is normally called initramfs_list and can be take place automatically.
generated with gen_initramfs_list.sh script from the root
directory structure. The rootfs.initramfs file generated in the images/ directory
The file is then used in the kernel build process to generate is only a text file describing the contents of the initramfs
the cpio filesystem for the initial ramdisk. Make sure that in a format understood by the CONFIG_INITRAMFS_SOURCE kernel
you configure this file in kernel build configuration. configuration option.
The location in the kernel build configuration menu is
Device Drivers -> Block devices -> Initramfs source file(s). Note that enabling initramfs together with other filesystem
The configuration variable is CONFIG_INITRAMFS_SOURCE 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" comment "initramfs requires a Linux kernel to be built"
depends on !BR2_LINUX_KERNEL depends on !BR2_LINUX_KERNEL