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Use helper functions to access current->state. Direct assignments are prone to races and therefore buggy. current->state = TASK_RUNNING is replaced by __set_current_state() Thanks to Peter Zijlstra for the exact definition of the problem. Suggested-By: Peter Zijlstra <[email protected]> Signed-off-by: Fabian Frederick <[email protected]> Acked-By: Jan "Yenya" Kasprzak <[email protected]> Signed-off-by: David S. Miller <[email protected]>