ring-buffer: convert to raw spinlocks

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Impact: no lockdep debugging of ring buffer

The problem with running lockdep on the ring buffer is that the
ring buffer is the core infrastructure of ftrace. What happens is
that the tracer will start tracing the lockdep code while lockdep
is testing the ring buffers locks.  This can cause lockdep to
fail due to testing cases that have not fully finished their
locking transition.

This patch converts the spin locks used by the ring buffer back
into raw spin locks which lockdep does not check.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Steven Rostedt 2008-11-06 00:09:43 -05:00 • committed by Ingo Molnar

parent 9036990d46

commit 3e03fb7f1d

1 changed files with 20 additions and 11 deletions

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31

kernel/trace/ring_buffer.c

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