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Paul E. McKenney authored
Currently, if a grace period ends just as the stall-warning timeout fires, an empty stall warning will be printed. This is not helpful, so this commit avoids these useless warnings by rechecking completion after awakening in synchronize_sched_expedited_wait(). Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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