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| author | Andreas Gruenbacher <agruenba@redhat.com> | 2023-09-08 01:40:48 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-06-12 11:12:52 +0200 |
| commit | a9da6ddaef9ef7d9afd3f89e447c60e38f74bf44 (patch) | |
| tree | d73c932ab2f3f50ae6a1243909027293870fcd55 /kernel/kthread.c | |
| parent | 1b5234b2241a229b06d483e0a14b0a0ed1346d6d (diff) | |
kthread: add kthread_stop_put
[ Upstream commit 6309727ef27162deabd5c095c11af24970fba5a2 ]
Add a kthread_stop_put() helper that stops a thread and puts its task
struct. Use it to replace the various instances of kthread_stop()
followed by put_task_struct().
Remove the kthread_stop_put() macro in usbip that is similar but doesn't
return the result of kthread_stop().
[agruenba@redhat.com: fix kerneldoc comment]
Link: https://lkml.kernel.org/r/20230911111730.2565537-1-agruenba@redhat.com
[akpm@linux-foundation.org: document kthread_stop_put()'s argument]
Link: https://lkml.kernel.org/r/20230907234048.2499820-1-agruenba@redhat.com
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Stable-dep-of: bb9025f4432f ("dma-mapping: benchmark: fix up kthread-related error handling")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'kernel/kthread.c')
| -rw-r--r-- | kernel/kthread.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/kernel/kthread.c b/kernel/kthread.c index 1eea53050babc..290cbc845225e 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -715,6 +715,24 @@ int kthread_stop(struct task_struct *k) } EXPORT_SYMBOL(kthread_stop); +/** + * kthread_stop_put - stop a thread and put its task struct + * @k: thread created by kthread_create(). + * + * Stops a thread created by kthread_create() and put its task_struct. + * Only use when holding an extra task struct reference obtained by + * calling get_task_struct(). + */ +int kthread_stop_put(struct task_struct *k) +{ + int ret; + + ret = kthread_stop(k); + put_task_struct(k); + return ret; +} +EXPORT_SYMBOL(kthread_stop_put); + int kthreadd(void *unused) { struct task_struct *tsk = current; |