Neither the manpage, --help output, nor the Gentoo Wiki page has any information about the /etc/initramfs.mounts config file and the possibility to mount additional filesystems in the initramfs. Reproducible: Always
P.S. I'm not sure if this should have been reported in Documentation or here. It looks like the Documentation section is for Web documentation only.
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/proj/genkernel.git/commit/?id=3c86ab829d04a3c7637f63091f3416b5015acd6d commit 3c86ab829d04a3c7637f63091f3416b5015acd6d Author: Thomas Deutschmann <whissi@gentoo.org> AuthorDate: 2019-08-06 21:52:11 +0000 Commit: Thomas Deutschmann <whissi@gentoo.org> CommitDate: 2019-08-07 15:03:45 +0000 manpage: Add documentation about initramfs.mounts file Bug: https://bugs.gentoo.org/560710 Signed-off-by: Thomas Deutschmann <whissi@gentoo.org> doc/genkernel.8.txt | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
Updated man page is included in >=sys-kernel/genkernel-4.0.0_beta11, thank you for the report!