5253 kmem_alloc/kmem_zalloc won't fail with KM_SLEEP
5254 getrbuf won't fail with KM_SLEEP

*** 51,62 ****
          /*
           * Allocate mmu state structure and link it to the
           * px state structure.
           */
          mmu_p = kmem_zalloc(sizeof (px_mmu_t), KM_SLEEP);
-         if (mmu_p == NULL)
-                 return (DDI_FAILURE);
  
          px_p->px_mmu_p = mmu_p;
          mmu_p->mmu_px_p = px_p;
          mmu_p->mmu_inst = ddi_get_instance(dip);
  
--- 51,60 ----