Name
napi_schedule_prep — 
  check if napi can be scheduled
 
Synopsis
| int fsfuncnapi_schedule_prep ( | struct napi_struct * n ); | 
 
Description
   Test if NAPI routine is already running, and if not mark
   it as running.  This is used as a condition variable
   insure only one NAPI poll instance runs.  We also make
   sure there is no pending NAPI disable.