From 2c03376d2db005869b1d4449097d51c96196529e Mon Sep 17 00:00:00 2001
From: Oleg Nesterov <oleg@redhat.com>
Date: Thu, 9 Oct 2014 15:25:51 -0700
Subject: [PATCH] proc/maps: replace proc_maps_private->pid with "struct inode
 *inode"

m_start() can use get_proc_task() instead, and "struct inode *"
provides more potentially useful info, see the next changes.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Greg Ungerer <gerg@uclinux.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/proc/internal.h   | 2 +-
 fs/proc/task_mmu.c   | 4 ++--
 fs/proc/task_nommu.c | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index d27182854a28..aa7a0ee182e1 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -268,7 +268,7 @@ extern int proc_remount(struct super_block *, int *, char *);
  * task_[no]mmu.c
  */
 struct proc_maps_private {
-	struct pid *pid;
+	struct inode *inode;
 	struct task_struct *task;
 	struct mm_struct *mm;
 #ifdef CONFIG_MMU
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 34d93a1cdeec..4793e4a843b0 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -164,7 +164,7 @@ static void *m_start(struct seq_file *m, loff_t *ppos)
 	if (last_addr == -1UL)
 		return NULL;
 
-	priv->task = get_pid_task(priv->pid, PIDTYPE_PID);
+	priv->task = get_proc_task(priv->inode);
 	if (!priv->task)
 		return ERR_PTR(-ESRCH);
 
@@ -231,7 +231,7 @@ static int proc_maps_open(struct inode *inode, struct file *file,
 	if (!priv)
 		return -ENOMEM;
 
-	priv->pid = proc_pid(inode);
+	priv->inode = inode;
 	priv->mm = proc_mem_open(inode, PTRACE_MODE_READ);
 	if (IS_ERR(priv->mm)) {
 		int err = PTR_ERR(priv->mm);
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
index 429cb7a5419e..f36e213835cc 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
@@ -212,7 +212,7 @@ static void *m_start(struct seq_file *m, loff_t *pos)
 	loff_t n = *pos;
 
 	/* pin the task and mm whilst we play with them */
-	priv->task = get_pid_task(priv->pid, PIDTYPE_PID);
+	priv->task = get_proc_task(priv->inode);
 	if (!priv->task)
 		return ERR_PTR(-ESRCH);
 
@@ -276,7 +276,7 @@ static int maps_open(struct inode *inode, struct file *file,
 	if (!priv)
 		return -ENOMEM;
 
-	priv->pid = proc_pid(inode);
+	priv->inode = inode;
 	priv->mm = proc_mem_open(inode, PTRACE_MODE_READ);
 	if (IS_ERR(priv->mm)) {
 		int err = PTR_ERR(priv->mm);
-- 
2.20.1