GPU drivers often need to create their own workqueues for various
reasons. Add the ability to do so.

Signed-off-by: Alice Ryhl <aliceryhl@google.com>
---
Changes in v2:
- Redo how flagging works.
- Restrict delayed work to not be usable on custom workqueues.
- Link to v1: https://lore.kernel.org/r/20250411-create-workqueue-v1-1-f7dbe7f1e05f@google.com

---
Alice Ryhl (2):
      rust: workqueue: restrict delayed work to global wqs
      rust: workqueue: add creation of workqueues

 rust/helpers/workqueue.c |   6 ++
 rust/kernel/workqueue.rs | 187 ++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 189 insertions(+), 4 deletions(-)
---
base-commit: 211ddde0823f1442e4ad052a2f30f050145ccada
change-id: 20250411-create-workqueue-d053158c7a4b

Best regards,
-- 
Alice Ryhl <aliceryhl@google.com>