On Wed, Feb 01, 2012 at 07:45:55PM +0100, Lars-Peter Clausen wrote: > We always hold the waitqueue lock when modifying the flags field. So it is > safe > to use the non-atomic bitops here instead of the atomic versions. > > The lock has to be held, because we need to clear the busy flag and flush the > event fifo in one atomic operation when closing the event file descriptor. >
Is the performance improvement worth it? regards, dan carpenter
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