Mark data races to work->wait_index as benign using READ_ONCE and WRITE_ONCE. These accesses are expected to be racy.
Signed-off-by: linke li <lilink...@qq.com> --- kernel/trace/ring_buffer.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 0699027b4f4c..a47e9e9750cc 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -798,7 +798,7 @@ void ring_buffer_wake_waiters(struct trace_buffer *buffer, int cpu) rbwork = &cpu_buffer->irq_work; } - rbwork->wait_index++; + WRITE_ONCE(rbwork->wait_index, READ_ONCE(rbwork->wait_index) + 1); /* make sure the waiters see the new index */ smp_wmb(); @@ -906,7 +906,7 @@ int ring_buffer_wait(struct trace_buffer *buffer, int cpu, int full) /* Make sure to see the new wait index */ smp_rmb(); - if (wait_index != work->wait_index) + if (wait_index != READ_ONCE(work->wait_index)) break; } -- 2.39.3 (Apple Git-145)