Re: [PATCH] rust: workqueue: replace deprecated system_wq with system_{percpu,dfl}_wq

[Boqun Feng]

On Tue, Oct 13, 2026 at 01:51:39PM +0000, Alice Ryhl wrote:
> From: Danilo Krummrich <dakr@xxxxxxxxxx>
> 
> system_wq is deprecated and triggers a runtime warning:
> 
> 	[    0.857414] workqueue: work func ...WorkItemPointerKy0_E3runB7_ enqueued on deprecated workqueue. Use system_{percpu|dfl}_wq instead.
> 
> Replace system() with system_percpu() and system_dfl(), to match the
> previous behavior of the deprecated system() and convert doc examples
> and tests to system_dfl().
> 
> Fixes: 64d8eae3f895 ("workqueue: Add warnings and fallback if system_{unbound}_wq is used")
> Signed-off-by: Danilo Krummrich <dakr@xxxxxxxxxx>
> Reviewed-by: Daniel Almeida <daniel.almeida@xxxxxxxxxxxxx>
> Signed-off-by: Alice Ryhl <aliceryhl@xxxxxxxxxx>

FWIW:

Reviewed-by: Boqun Feng <boqun@xxxxxxxxxx>

Regards,
Boqun

> ---
> This patch was previously sent as part of other workqueue series [1][2].
> However it's a fix that is independent of those series, so it's sent on
> its own here.
> 
> [1] https://lore.kernel.org/all/20260726223613.1242940-3-dakr@xxxxxxxxxx
> [2] https://lore.kernel.org/all/20260807165252.3849875-2-dakr@xxxxxxxxxx
> 
> Changes since [2]:
>   - Rebase on v7.3-rc7 and also convert the new SpinLockIrq KUnit test,
>     which calls workqueue::system() and otherwise fails to build.
>   - Add Fixes: tag for the commit that made system_wq warn.
>   - Collect Reviewed-by from Daniel.
> ---
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