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>
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8e254c1d18
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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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