Arguments

 

addr

   The address of the region that you want to synchronize.
 

len

   The length, in bytes, of the region that you want to synchronize.
 

flags

   One of the following symbolic constants defined in the <mman.h>
   header file:

   MS_SYNC        Synchronous cache flush
   MS_ASYNC       Asynchronous cache flush
   MS_            Invalidate cashed pages
   INVALIDATE