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signal: kill JOBCTL_TASK_WORK

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[ Upstream commit 98b89b649fce39dacb9dc036d6d0fdb8caff73f7 ]

It's no longer used, get rid of it.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jens Axboe
2020-10-09 16:03:01 -06:00
committed by Greg Kroah-Hartman
parent 788d082426
commit c91ab04781
2 changed files with 1 additions and 23 deletions
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20
kernel/signal.c
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@@ -2544,26 +2544,6 @@ bool get_signal(struct ksignal *ksig)
relock:
spin_lock_irq(&sighand->siglock);
/*
* Make sure we can safely read ->jobctl() in task_work add. As Oleg
* states:
*
* It pairs with mb (implied by cmpxchg) before READ_ONCE. So we
* roughly have
*
* task_work_add: get_signal:
* STORE(task->task_works, new_work); STORE(task->jobctl);
* mb(); mb();
* LOAD(task->jobctl); LOAD(task->task_works);
*
* and we can rely on STORE-MB-LOAD [ in task_work_add].
*/
smp_store_mb(current->jobctl, current->jobctl & ~JOBCTL_TASK_WORK);
if (unlikely(current->task_works)) {
spin_unlock_irq(&sighand->siglock);
task_work_run();
goto relock;
}
/*
* Every stopped thread goes here after wakeup. Check to see if