ring-buffer: do not reset while in a commit
The callers of reset must ensure that no commit can be taking place at the time of the reset. If it does then we may corrupt the ring buffer. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>hifive-unleashed-5.1
parent
8e254c1d18
commit
41b6a95d69
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@ -3373,12 +3373,16 @@ void ring_buffer_reset_cpu(struct ring_buffer *buffer, int cpu)
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spin_lock_irqsave(&cpu_buffer->reader_lock, flags);
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if (RB_WARN_ON(cpu_buffer, local_read(&cpu_buffer->committing)))
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goto out;
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__raw_spin_lock(&cpu_buffer->lock);
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rb_reset_cpu(cpu_buffer);
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__raw_spin_unlock(&cpu_buffer->lock);
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out:
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spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags);
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atomic_dec(&cpu_buffer->record_disabled);
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