linux-next: build failure after merge of the block tree

[Mark Brown]

Hi all,

After merging the block tree, today's linux-next build (x86_64
allmodconfig) failed like this:

error: unused import: `c_str`
 --> /tmp/next/build/drivers/block/rnull/configfs.rs:6:5
  |
6 |     c_str,
  |     ^^^^^
  |
  = note: `-D unused-imports` implied by `-D warnings`
  = help: to override `-D warnings` add `#[allow(unused_imports)]`

error: aborting due to 1 previous error

Caused by commit

  4cef2fcda3ada (rnull: replace `kernel::c_str!` with C-Strings)

I have used the version from 20260116 instead.