53 static void privcmd_buf_vmapriv_free(struct privcmd_buf_vma_private *vma_priv)  in privcmd_buf_vmapriv_free()  argument
57 	list_del(&vma_priv->list);  in privcmd_buf_vmapriv_free()
59 	for (i = 0; i < vma_priv->n_pages; i++)  in privcmd_buf_vmapriv_free()
60 		__free_page(vma_priv->pages[i]);  in privcmd_buf_vmapriv_free()
62 	kfree(vma_priv);  in privcmd_buf_vmapriv_free()
68 	struct privcmd_buf_vma_private *vma_priv;  in privcmd_buf_release()  local
73 		vma_priv = list_first_entry(&file_priv->list,  in privcmd_buf_release()
76 		privcmd_buf_vmapriv_free(vma_priv);  in privcmd_buf_release()
88 	struct privcmd_buf_vma_private *vma_priv = vma->vm_private_data;  in privcmd_buf_vma_open()  local
90 	if (!vma_priv)  in privcmd_buf_vma_open()
93 	mutex_lock(&vma_priv->file_priv->lock);  in privcmd_buf_vma_open()
94 	vma_priv->users++;  in privcmd_buf_vma_open()
95 	mutex_unlock(&vma_priv->file_priv->lock);  in privcmd_buf_vma_open()
100 	struct privcmd_buf_vma_private *vma_priv = vma->vm_private_data;  in privcmd_buf_vma_close()  local
103 	if (!vma_priv)  in privcmd_buf_vma_close()
106 	file_priv = vma_priv->file_priv;  in privcmd_buf_vma_close()
110 	vma_priv->users--;  in privcmd_buf_vma_close()
111 	if (!vma_priv->users)  in privcmd_buf_vma_close()
112 		privcmd_buf_vmapriv_free(vma_priv);  in privcmd_buf_vma_close()
135 	struct privcmd_buf_vma_private *vma_priv;  in privcmd_buf_mmap()  local
143 	vma_priv = kzalloc(struct_size(vma_priv, pages, count), GFP_KERNEL);  in privcmd_buf_mmap()
144 	if (!vma_priv)  in privcmd_buf_mmap()
148 		vma_priv->pages[i] = alloc_page(GFP_KERNEL | __GFP_ZERO);  in privcmd_buf_mmap()
149 		if (!vma_priv->pages[i])  in privcmd_buf_mmap()
151 		vma_priv->n_pages++;  in privcmd_buf_mmap()
156 	vma_priv->file_priv = file_priv;  in privcmd_buf_mmap()
157 	vma_priv->users = 1;  in privcmd_buf_mmap()
161 	vma->vm_private_data = vma_priv;  in privcmd_buf_mmap()
163 	list_add(&vma_priv->list, &file_priv->list);  in privcmd_buf_mmap()
165 	if (vma_priv->n_pages != count)  in privcmd_buf_mmap()
168 		ret = vm_map_pages_zero(vma, vma_priv->pages,  in privcmd_buf_mmap()
169 						vma_priv->n_pages);  in privcmd_buf_mmap()
172 		privcmd_buf_vmapriv_free(vma_priv);  in privcmd_buf_mmap()