5edbea5063
Since the grant table is allocated dynamically, a system service always runs the risk of running out of memory at run time when trying to allocate a grant. In order to allow services to mitigate that risk, grants can now be preallocated, typically at system service startup, using the new cpf_prealloc(3) libsys function. The function takes a 'count' parameter that indicates the number of additional grants to preallocate. Thus, the function may be called from multiple submodules within a service, each preallocating their own maximum of grants that it may need at run time. Change-Id: I6904726a722a8c27dfe2efa470e683718f310272