148 	down_write(&current->mm->mmap_sem);  in ib_umem_get()
150 	locked     = npages + current->mm->pinned_vm;  in ib_umem_get()
173 		ret = get_user_pages(current, current->mm, cur_base,  in ib_umem_get()
216 		current->mm->pinned_vm = locked;  in ib_umem_get()
218 	up_write(&current->mm->mmap_sem);  in ib_umem_get()
231 	down_write(&umem->mm->mmap_sem);  in ib_umem_account()
232 	umem->mm->pinned_vm -= umem->diff;  in ib_umem_account()
233 	up_write(&umem->mm->mmap_sem);  in ib_umem_account()
234 	mmput(umem->mm);  in ib_umem_account()
245 	struct mm_struct *mm;  in ib_umem_release()  local
255 	mm = get_task_mm(task);  in ib_umem_release()
257 	if (!mm)  in ib_umem_release()
271 		if (!down_write_trylock(&mm->mmap_sem)) {  in ib_umem_release()
273 			umem->mm   = mm;  in ib_umem_release()
280 		down_write(&mm->mmap_sem);  in ib_umem_release()
282 	mm->pinned_vm -= diff;  in ib_umem_release()
283 	up_write(&mm->mmap_sem);  in ib_umem_release()
284 	mmput(mm);  in ib_umem_release()