fs/proc/task_mmu.c

107 static void hold_task_mempolicy(struct proc_maps_private *priv)
109 	struct task_struct *task = priv->task;
112 	priv->task_mempolicy = get_task_policy(task);
113 	mpol_get(priv->task_mempolicy);
116 static void release_task_mempolicy(struct proc_maps_private *priv)
118 	mpol_put(priv->task_mempolicy);
121 static void hold_task_mempolicy(struct proc_maps_private *priv)
124 static void release_task_mempolicy(struct proc_maps_private *priv)
129 static struct vm_area_struct *proc_get_vma(struct proc_maps_private *priv,
132 	struct vm_area_struct *vma = vma_next(&priv->iter);
138 		vma = get_gate_vma(priv->mm);
146 	struct proc_maps_private *priv = m->private;
154 	priv->task = get_proc_task(priv->inode);
155 	if (!priv->task)
158 	mm = priv->mm;
160 		put_task_struct(priv->task);
161 		priv->task = NULL;
167 		put_task_struct(priv->task);
168 		priv->task = NULL;
172 	vma_iter_init(&priv->iter, mm, last_addr);
173 	hold_task_mempolicy(priv);
177 	return proc_get_vma(priv, ppos);
191 	struct proc_maps_private *priv = m->private;
192 	struct mm_struct *mm = priv->mm;
194 	if (!priv->task)
197 	release_task_mempolicy(priv);
200 	put_task_struct(priv->task);
201 	priv->task = NULL;
207 	struct proc_maps_private *priv = __seq_open_private(file, ops, psize);
209 	if (!priv)
212 	priv->inode = inode;
213 	priv->mm = proc_mem_open(inode, PTRACE_MODE_READ);
214 	if (IS_ERR(priv->mm)) {
215 		int err = PTR_ERR(priv->mm);
227 	struct proc_maps_private *priv = seq->private;
229 	if (priv->mm)
230 		mmdrop(priv->mm);
886 	struct proc_maps_private *priv = m->private;
888 	struct mm_struct *mm = priv->mm;
894 	priv->task = get_proc_task(priv->inode);
895 	if (!priv->task)
907 	hold_task_mempolicy(priv);
927 				release_task_mempolicy(priv);
994 	release_task_mempolicy(priv);
1000 	put_task_struct(priv->task);
1001 	priv->task = NULL;
1022 	struct proc_maps_private *priv;
1024 	priv = kzalloc(sizeof(*priv), GFP_KERNEL_ACCOUNT);
1025 	if (!priv)
1028 	ret = single_open(file, show_smaps_rollup, priv);
1032 	priv->inode = inode;
1033 	priv->mm = proc_mem_open(inode, PTRACE_MODE_READ);
1034 	if (IS_ERR(priv->mm)) {
1035 		ret = PTR_ERR(priv->mm);
1044 	kfree(priv);
1051 	struct proc_maps_private *priv = seq->private;
1053 	if (priv->mm)
1054 		mmdrop(priv->mm);
1056 	kfree(priv);