136 	down_write(&current->mm->mmap_sem);  in ib_umem_get()
138 	locked     = npages + current->mm->locked_vm;  in ib_umem_get()
150 		ret = get_user_pages(current, current->mm, cur_base,  in ib_umem_get()
208 		current->mm->locked_vm = locked;  in ib_umem_get()
210 	up_write(&current->mm->mmap_sem);  in ib_umem_get()
223 	down_write(&umem->mm->mmap_sem);  in ib_umem_account()
224 	umem->mm->locked_vm -= umem->diff;  in ib_umem_account()
225 	up_write(&umem->mm->mmap_sem);  in ib_umem_account()
226 	mmput(umem->mm);  in ib_umem_account()
237 	struct mm_struct *mm;  in ib_umem_release()  local
242 	mm = get_task_mm(current);  in ib_umem_release()
243 	if (!mm) {  in ib_umem_release()
259 		if (!down_write_trylock(&mm->mmap_sem)) {  in ib_umem_release()
261 			umem->mm   = mm;  in ib_umem_release()
268 		down_write(&mm->mmap_sem);  in ib_umem_release()
270 	current->mm->locked_vm -= diff;  in ib_umem_release()
271 	up_write(&mm->mmap_sem);  in ib_umem_release()
272 	mmput(mm);  in ib_umem_release()