Widespread crashes in next-20180906

[Guenter Roeck]

Build results:
	total: 134 pass: 133 fail: 1
Failed builds:
	sparc32:allmodconfig
Qemu test results:
	total: 311 pass: 76 fail: 235
Failed builds:
	<pretty much everything trying to boot from disk>

Error message is always something like

Filesystem requires source device
VFS: Cannot open root device "hda" or unknown-block(3,0): error -2

The only variance is the boot device. Logs in full glory are available
at https://kerneltests.org/builders/, in the "next" column.

I did not run bisect, but the recent filesystem changes are a definite suspect.

Guenter