task_work: add helper for more targeted task_work canceling

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The only exported helper we have right now is task_work_cancel(), which
cancels any task_work from a given task where func matches the queued
work item. This is a bit too coarse for some use cases. Add a
task_work_cancel_match() that allows to more specifically target
individual work items outside of purely the callback function used.

task_work_cancel() can be trivially implemented on top of that, hence do
so.

Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Jens Axboe 2021-04-01 19:53:29 -06:00

parent b2e720ace2

commit c7aab1a7c5

2 changed files with 30 additions and 7 deletions

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include/linux/task_work.h

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