[PATCH 2/6] fs: add frozen sb state helpers

[Christoph Hellwig]

On Sun, May 07, 2023 at 06:17:13PM -0700, Luis Chamberlain wrote:
> Provide helpers so that we can check a superblock frozen state.
> This will make subsequent changes easier to read. This makes
> no functional changes.

I'll look at the further changes, but having frozen/unfrozen helpers
that sound binary while we have 4 shades of gray seems rather confusing
to me.