hfi1_mmu_rb_release
void hfi1_mmu_rb_release(struct kref *refcount);
kref_put(&node->rb.refcount, hfi1_mmu_rb_release);
kref_put(&node->rb.refcount, hfi1_mmu_rb_release);
kref_put(&cache_entry->rb.refcount, hfi1_mmu_rb_release);