SPL symbol unavailable or missing deps in 4.18 kernel config with builtin spl-0.7.10

[fling-]

System information

Type	Version/Name
Distribution Name	gentoo
Distribution Version	17.1
Linux Kernel	4.18
Architecture	amd64
ZFS Version	none
SPL Version	0.7.10

Describe the problem you're observing

Can't enable CONFIG_SPL in 4.18 kernel config
oldconfig does not suggest to enable the symbol when it is missing from config
oldconfig removes the symbol from the config when it is present

It works fine with 4.17

Describe how to reproduce the problem

Using https://gist.github.com/fling-/80b9afcad301d985dfb72753b53b463e

Include any warning/errors/backtraces from the system logs

oldconfig output is

scripts/kconfig/conf  --oldconfig Kconfig
#
# configuration written to .config
#

but it is expected to include this prompt:

Solaris Porting Layer (SPL) (SPL) [N/m/y/?] (NEW)

[fling-]

PMT on irc suggested to test with 0.8
with zfs-0.8-rc1 builtin 4.18 oldconfig asks for
ZFS filesystem support (ZFS) [N/m/y/?] (NEW)
Which is expected as there is no separate spl for 0.8 anymore

[behlendorf]

@fling- from your comments it's not clear to me if this really is an issue with the 0.7.10 spl tag. Could you please clarify.

[fling-]

@behlendorf it is an issue with 0.7.10 spl tag

[behlendorf]

@fling- the issue with 4.18 is due to torvalds/linux@104daea, proposed commit behlendorf/spl@88611c5 resolves the issue and we'll get it pulled in to 0.7.11. And as you posted above this issue does not effect 0.8.0-rc1 due to the spl merge. Thanks for catching this!

[stale]

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