3752 want more verifiable dbuf user eviction
Submitted by:   Justin Gibbs <justing@spectralogic.com>
Submitted by:   Will Andrews <willa@spectralogic.com>

*** 33,42 ****
--- 33,45 ----
  
  #ifdef  __cplusplus
  extern "C" {
  #endif
  
+ #ifndef _KERNEL
+ #include <stddef.h>
+ #endif
  #include <sys/note.h>
  #include <sys/types.h>
  #include <sys/t_lock.h>
  #include <sys/atomic.h>
  #include <sys/sysmacros.h>