TASK_CONTEXT_SIZE  110 arch/powerpc/include/asm/book3s/64/mmu.h 		mm_context_id_t extended_id[TASK_SIZE_USER64/TASK_CONTEXT_SIZE];
TASK_CONTEXT_SIZE   23 arch/powerpc/mm/book3s64/hash_pgtable.c #if H_PGTABLE_RANGE > (USER_VSID_RANGE * (TASK_SIZE_USER64 / TASK_CONTEXT_SIZE))