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

[Darrick J. Wong]

On Wed, Jun 07, 2023 at 10:05:46PM -0700, Christoph Hellwig wrote:
> 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.

That was my first reaction too.

Then it occurred to me that *some* people might still be clued into that
subtlety if they happened to ask themselves why there are predicates for
_is_frozen and _is_unfrozen.

But in the end I think I decided that an enum isn't subtle like that at
all and clearly forgot to reply with that.

--D