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waking up a single process from the wait queue


 HI,

  How can we wake up only a single process from the wait queue??? we use 
wake_up to wake up the processes from the wait queue.. but wake_up wakes 
up all the processes on the wait queue. 

  it invokes wake_up_common() which wakes up nr exclusive tasks and all 
non exclusive tasks... so how can we make wait queue to have exclusive 
tasks...

 thanks,
raghu

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