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authorEric W. Biederman <ebiederm@xmission.com>2021-12-22 22:10:09 -0600
committerEric W. Biederman <ebiederm@xmission.com>2022-01-08 09:39:49 -0600
commite32cf5dfbe227b355776948b2c9b5691b84d1cbd (patch)
treec00df29e5a3bf47010fbdf5e5dbaa20325b7d1a6 /fs/io-wq.h
parent00580f03af5eb2a527875b4a80a5effd95bda2fa (diff)
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kthread: Generalize pf_io_worker so it can point to struct kthread
The point of using set_child_tid to hold the kthread pointer was that it already did what is necessary. There are now restrictions on when set_child_tid can be initialized and when set_child_tid can be used in schedule_tail. Which indicates that continuing to use set_child_tid to hold the kthread pointer is a bad idea. Instead of continuing to use the set_child_tid field of task_struct generalize the pf_io_worker field of task_struct and use it to hold the kthread pointer. Rename pf_io_worker (which is a void * pointer) to worker_private so it can be used to store kthreads struct kthread pointer. Update the kthread code to store the kthread pointer in the worker_private field. Remove the places where set_child_tid had to be dealt with carefully because kthreads also used it. Link: https://lkml.kernel.org/r/CAHk-=wgtFAA9SbVYg0gR1tqPMC17-NYcs0GQkaYg1bGhh1uJQQ@mail.gmail.com Link: https://lkml.kernel.org/r/87a6grvqy8.fsf_-_@email.froward.int.ebiederm.org Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'fs/io-wq.h')
-rw-r--r--fs/io-wq.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/io-wq.h b/fs/io-wq.h
index 41bf37674a49..c7c23947cbcd 100644
--- a/fs/io-wq.h
+++ b/fs/io-wq.h
@@ -200,6 +200,6 @@ static inline void io_wq_worker_running(struct task_struct *tsk)
static inline bool io_wq_current_is_worker(void)
{
return in_task() && (current->flags & PF_IO_WORKER) &&
- current->pf_io_worker;
+ current->worker_private;
}
#endif