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Commit 41b6a95d authored by Steven Rostedt's avatar Steven Rostedt Committed by Steven Rostedt
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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: default avatarSteven Rostedt <rostedt@goodmis.org>
parent 8e254c1d

kernel/trace/ring_buffer.c

+4 −0
Original line number Diff line number Diff line
@@ -3373,12 +3373,16 @@ void ring_buffer_reset_cpu(struct ring_buffer *buffer, int cpu) 


	spin_lock_irqsave(&cpu_buffer->reader_lock, flags);



	if (RB_WARN_ON(cpu_buffer, local_read(&cpu_buffer->committing)))

		goto out;



	__raw_spin_lock(&cpu_buffer->lock);



	rb_reset_cpu(cpu_buffer);



	__raw_spin_unlock(&cpu_buffer->lock);



 out:

	spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags);



	atomic_dec(&cpu_buffer->record_disabled);