166 	down_write(&current->mm->mmap_sem);  in ib_umem_get()
168 	locked     = npages + current->mm->pinned_vm;  in ib_umem_get()
191 		ret = get_user_pages(current, current->mm, cur_base,  in ib_umem_get()
234 		current->mm->pinned_vm = locked;  in ib_umem_get()
236 	up_write(&current->mm->mmap_sem);  in ib_umem_get()
249 	down_write(&umem->mm->mmap_sem);  in ib_umem_account()
250 	umem->mm->pinned_vm -= umem->diff;  in ib_umem_account()
251 	up_write(&umem->mm->mmap_sem);  in ib_umem_account()
252 	mmput(umem->mm);  in ib_umem_account()
263 	struct mm_struct *mm;  in ib_umem_release()  local
278 	mm = get_task_mm(task);  in ib_umem_release()
280 	if (!mm)  in ib_umem_release()
294 		if (!down_write_trylock(&mm->mmap_sem)) {  in ib_umem_release()
296 			umem->mm   = mm;  in ib_umem_release()
303 		down_write(&mm->mmap_sem);  in ib_umem_release()
305 	mm->pinned_vm -= diff;  in ib_umem_release()
306 	up_write(&mm->mmap_sem);  in ib_umem_release()
307 	mmput(mm);  in ib_umem_release()