Name
ida_pre_get — 
     reserve resources for ida allocation
 
Synopsis
| int ida_pre_get ( | struct ida * ida, | 
|  | gfp_t gfp_mask ); | 
 
Arguments
- ida
- 
     ida handle
     
- gfp_mask
- 
     memory allocation flag
     
Description
   This function should be called prior to locking and calling the
   following function.  It preallocates enough memory to satisfy the
   worst possible allocation.
   
   If the system is REALLY out of memory this function returns 0,
   otherwise 1.