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| author |   Tejun Heo <tj@kernel.org> | 2024-01-29 08:11:24 -1000 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2024-01-29 08:11:24 -1000 |
| commit | 9f66cff212bb3c1cd25996aaa0dfd0c9e9d8baab (patch) | |
| tree | 11eeb44d70cce5fc9b11078f9413a92748189e9f /scripts/generate_rust_analyzer.py | |
| parent | workqueue: Make wq_adjust_max_active() round-robin pwqs while activating (diff) | |
| download | linux-rng-9f66cff212bb3c1cd25996aaa0dfd0c9e9d8baab.tar.xz linux-rng-9f66cff212bb3c1cd25996aaa0dfd0c9e9d8baab.zip | |
workqueue: RCU protect wq->dfl_pwq and implement accessors for it
wq->cpu_pwq is RCU protected but wq->dfl_pwq isn't. This is okay because
currently wq->dfl_pwq is used only accessed to install it into wq->cpu_pwq
which doesn't require RCU access. However, we want to be able to access
wq->dfl_pwq under RCU in the future to access its __pod_cpumask and the code
can be made easier to read by making the two pwq fields behave in the same
way.
- Make wq->dfl_pwq RCU protected.
- Add unbound_pwq_slot() and unbound_pwq() which can access both ->dfl_pwq
and ->cpu_pwq. The former returns the double pointer that can be used
access and update the pwqs. The latter performs locking check and
dereferences the double pointer.
- pwq accesses and updates are converted to use unbound_pwq[_slot]().
Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Lai Jiangshan <jiangshanlai@gmail.com>
Diffstat (limited to 'scripts/generate_rust_analyzer.py')
0 files changed, 0 insertions, 0 deletions