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workqueue: BUG_ON() instead of returning NULL in wq_node_nr_active()

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wq_node_nr_active() warns and returns NULL when @wq is not unbound, but
every caller dereferences the result right away, so the WARN_ON_ONCE()
only moves the oops one frame up, as raised by Tejun.

Fix it by BUGing_ON() instead of this silly WARN_ON_ONCE();

Fixes: b72fdc6510 ("workqueue: account nr_active by the backing pool")
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Breno Leitao 2026-08-12 09:03:20 -07:00 committed by Tejun Heo
parent 1d125f0e6c
commit 4e0ee51cc2
1 changed files with 1 additions and 2 deletions
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3
kernel/workqueue.c
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@ -1625,8 +1625,7 @@ static bool is_percpu_pool(struct worker_pool *pool)
static struct wq_node_nr_active *wq_node_nr_active(struct workqueue_struct *wq,
int node)
{
if (WARN_ON_ONCE(!(wq->flags & WQ_UNBOUND)))
return NULL;
BUG_ON(!(wq->flags & WQ_UNBOUND));
if (node == NUMA_NO_NODE)
node = nr_node_ids;