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c38a9ec2b2
Similarly to ETMv3, moving etmv4_drvdata::enable to an atomic type that gives the 'mode' of a tracer and prevents multiple, simultanious access by different subsystems. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>