This series adds configuration via configfs and remote completion to the rnull driver. The series also includes a set of changes to the rust block device driver API: a few cleanup patches, and a few features supporting the rnull changes. The series moves the raw buffer formatting logic from `kernel::block` to `kernel::string` and also improves that logic a bit. This series is a smaller subset of the patches available in the downstream rnull tree. I hope to minimize the delta between upstream and downstream over the next few kernel releases. Signed-off-by: Andreas Hindborg <a.hindborg@xxxxxxxxxx> --- Changes in v2: - Rework formatter logic. Add two new formatters that write to slices, one of which adds a trailing null byte. - Reorder and split patches so that changes are more clear. - Fix a typo in soft-irq patch summary. - Link to v1: https://lore.kernel.org/r/20250616-rnull-up-v6-16-v1-0-a4168b8e76b2@xxxxxxxxxx --- Andreas Hindborg (14): rust: str: normalize imports in `str.rs` rust: str: introduce `BorrowFormatter` rust: str: introduce `NullBorrowFormatter` rust: block: normalize imports for `gen_disk.rs` rust: block: use `NullBorrowFormatter` rust: block: remove `RawWriter` rust: block: remove trait bound from `mq::Request` definition rust: block: add block related constants rnull: move driver to separate directory rnull: enable configuration via `configfs` rust: block: add `GenDisk` private data support rust: block: mq: fix spelling in a safety comment rust: block: add remote completion to `Request` rnull: add soft-irq completion support MAINTAINERS | 2 +- drivers/block/Kconfig | 10 +- drivers/block/Makefile | 4 +- drivers/block/rnull.rs | 80 ----------- drivers/block/rnull/Kconfig | 13 ++ drivers/block/rnull/Makefile | 3 + drivers/block/rnull/configfs.rs | 277 +++++++++++++++++++++++++++++++++++++ drivers/block/rnull/rnull.rs | 105 ++++++++++++++ rust/kernel/block.rs | 12 ++ rust/kernel/block/mq.rs | 14 +- rust/kernel/block/mq/gen_disk.rs | 50 +++++-- rust/kernel/block/mq/operations.rs | 65 +++++++-- rust/kernel/block/mq/raw_writer.rs | 55 -------- rust/kernel/block/mq/request.rs | 21 ++- rust/kernel/str.rs | 95 ++++++++++++- 15 files changed, 622 insertions(+), 184 deletions(-) --- base-commit: e04c78d86a9699d136910cfc0bdcf01087e3267e change-id: 20250616-rnull-up-v6-16-b4571e28feee Best regards, -- Andreas Hindborg <a.hindborg@xxxxxxxxxx>
