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The comment in pm_runtime_blocked() is acutally wrong: power.last_status is not a bit field. Its data type is an enum and so one can reasonably assume that partial updates of it will not be observed. Accordingly, pm_runtime_blocked() can be converted to a static inline function and the related locking overhead can be eliminated, so long as it is only used in system suspend/resume code paths because power.last_status is not expected to be updated concurrently while that code is running. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Link: https://patch.msgid.link/1923449.tdWV9SEqCh@rjwysocki.net