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Subject[PATCH] workqueue: Use the kmem_cache_free() instead of kfree() to release pwq
Date
The pwq objects is allocated by kmem_cache_alloc(), this commit therefore
use kmem_cache_free() instead of kfree() to release pwq objects and also
make use the correct tracepoint("trace_kmem_cache_free") to trace the
release of pwq.

Signed-off-by: Zqiang <qiang.zhang1211@gmail.com>
---
kernel/workqueue.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index ebe24a5e1435..6f74cab2bd5a 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -4610,8 +4610,12 @@ static int alloc_and_link_pwqs(struct workqueue_struct *wq)

enomem:
if (wq->cpu_pwq) {
- for_each_possible_cpu(cpu)
- kfree(*per_cpu_ptr(wq->cpu_pwq, cpu));
+ for_each_possible_cpu(cpu) {
+ struct pool_workqueue *pwq = *per_cpu_ptr(wq->cpu_pwq, cpu);
+
+ if (pwq)
+ kmem_cache_free(pwq_cache, pwq);
+ }
free_percpu(wq->cpu_pwq);
wq->cpu_pwq = NULL;
}
--
2.17.1
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