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| author | Sebastian Andrzej Siewior <[email protected]> | 2021-10-06 13:18:50 +0200 |
|---|---|---|
| committer | Peter Zijlstra <[email protected]> | 2021-10-15 11:25:17 +0200 |
| commit | 810979682ccc98dbd83f341c18a2e556c30a7164 (patch) | |
| tree | a9d692207ee2df66d8292a5fe89ef0440465d419 /tools/testing/selftests/bpf/progs/test_prog_array_init.c | |
| parent | da6ff09943491819e077b94c284bf0a6b751c9b8 (diff) | |
irq_work: Allow irq_work_sync() to sleep if irq_work() no IRQ support.
irq_work() triggers instantly an interrupt if supported by the
architecture. Otherwise the work will be processed on the next timer
tick. In worst case irq_work_sync() could spin up to a jiffy.
irq_work_sync() is usually used in tear down context which is fully
preemptible. Based on review irq_work_sync() is invoked from preemptible
context and there is one waiter at a time. This qualifies it to use
rcuwait for synchronisation.
Let irq_work_sync() synchronize with rcuwait if the architecture
processes irqwork via the timer tick.
Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'tools/testing/selftests/bpf/progs/test_prog_array_init.c')
0 files changed, 0 insertions, 0 deletions