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Bug 494502 - sys-kernel/genkernel builds unbootable initramfs for kernels > 3.8 and XFS/btrfs in module
Summary: sys-kernel/genkernel builds unbootable initramfs for kernels > 3.8 and XFS/bt...
Status: RESOLVED FIXED
Alias: None
Product: Gentoo Hosted Projects
Classification: Unclassified
Component: genkernel (show other bugs)
Hardware: All Linux
: Normal major (vote)
Assignee: Gentoo Genkernel Maintainers
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Reported: 2013-12-17 07:06 UTC by Tomasz Wasiak
Modified: 2017-01-02 23:27 UTC (History)
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Description Tomasz Wasiak 2013-12-17 07:06:49 UTC 
Genkernel (3.4.47/git) builds unbootable initramfs for kernels from 3.8.0 up to newest for:
 - CONFIG_XFS_FS=m set in kernel configuration
 - CONFIG_BTRFS_FS=m set in kernel configuration
 - CONFIG_LIBCRC32C=m set in kernel configuration
 - ALLRAMDISKMODULES="0"/unset in genkernel.conf

Simplest solution (without recompiling kernel) is to set ALLRAMDISKMODULES to true as the cause for this problem is missing crc32c module which is not visible as libcrc32c dependency. There are same issues with btrfs.

Proper solution would be using different modules dependency system as greping modules.dep is not working nowadays.
Comment 1 Robin Johnson archtester Gentoo Infrastructure gentoo-dev Security 2017-01-02 23:27:54 UTC 
Fixed long ago, libcrc32c is included in initramfs.