Have you reported this upstream?
It does look to me that this dependency is working the wrong way, that
CONFIG_BLK_DEV_NVME depends on CONFIG_NVME and not the other way around.
The driver enabled by CONFIG_BLK_DEV_NVME has no entry points other than
the struct pci_driver callbacks, but it does call into the code enabled
by CONFIG_NVME.
I'm not convinced that yours is the correct fix though. I suspect that
BLK_DEV_NVME should have a "depends on NVM" or "select NVM" instead.
What I will do though is revert 32c662c58a9b9d0c99e713a14ca323a9a91c73a0
and change BLK_DEV_NVME back to =m. You should probably follow up
upstream to get a fix in place there.
** Changed in: linux (Ubuntu Bionic)
Status: Triaged => In Progress
** Changed in: linux (Ubuntu Bionic)
Assignee: (unassigned) => Seth Forshee (sforshee)
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https://bugs.launchpad.net/bugs/1759893
Title:
[18.04][config] regression: nvme and nvme_core couldn't be built as
modules starting 4.15-rc2
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