Re: [PATCH v5 00/18] Refcounted interrupt disable and SpinLockIrq for Rust

[Peter Zijlstra]

On Mon, Aug 10, 2026 at 10:53:55AM +0200, Peter Zijlstra wrote:
> On Mon, Aug 10, 2026 at 10:52:55AM +0200, Peter Zijlstra wrote:
> > On Fri, Aug 07, 2026 at 12:01:57AM -0700, Boqun Feng wrote:
> > 
> > > * Added underflow/overflow checking for interrupt disabling counter as
> > >   suggested by Shrikanth.
> > > * Added a max nesting level per suggestion from Shrikanth.
> > > * Document/comment updates.
> > 
> > Can I get those as separate patches? I had already queued and tested the
> > previous version.
> > 
> > (although as it turns out, I lost one SoB fixup somehow, so I'm applying
> > them again with just that Changelog ammended)
> 
> I'll grab the rust patches from this set I suppose. I had not yet looked
> at those, since I don't normally build rust crud and I need to figure
> out how to do that again :-(

So on tip/master + tip/locking/core (its fresh, so not in master yet).

I have debian experimental rustc, which is build against clang-23, so I
do:

$ make O=defconfig-build/ LLVM=-23 defconfig rust.config
$ make O=defconfig-build/ LLVM=-23 -j64

and that gets me a wild amount of build fail :/

error[E0560]: struct `blk_mq_tag_set` has no field named `ops`
  --> ../rust/kernel/block/mq/tag_set.rs:46:21
   |
46 |                     ops: OperationsVTable::<T>::build(),
   |                     ^^^ `blk_mq_tag_set` does not have this field
   |
   = note: available fields are: `_address`

error[E0560]: struct `blk_mq_tag_set` has no field named `nr_hw_queues`
  --> ../rust/kernel/block/mq/tag_set.rs:47:21
   |
47 |                     nr_hw_queues,
   |                     ^^^^^^^^^^^^ `blk_mq_tag_set` does not have this field
   |
   = note: available fields are: `_address`

... this goes on for a fair while.


And this is *before* I've applied any of the rust patches from this
series.

Why can't stuff just ever work :-(