linux-kernel - [PATCH 2/4] procfs: kill the global proc

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Date:	Sat, 19 Jun 2010 21:10:02 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Louis Rilling <louis.rilling@...labs.com>,
	Pavel Emelyanov <xemul@...nvz.org>,
	Linux Containers <containers@...ts.osdl.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/4] procfs: kill the global proc_mnt variable

After the previous cleanup in proc_get_sb() the global proc_mnt has
no reasons to exists, kill it.

Signed-off-by: Oleg Nesterov <oleg@...hat.com>
---

 fs/proc/internal.h |    1 -
 fs/proc/inode.c    |    2 --
 fs/proc/root.c     |    5 +++--
 3 files changed, 3 insertions(+), 5 deletions(-)

--- 35-rc3/fs/proc/internal.h~PNS_2_KILL_ROOT_MNT	2010-06-19 19:20:23.000000000 +0200
+++ 35-rc3/fs/proc/internal.h	2010-06-19 19:21:39.000000000 +0200
@@ -106,7 +106,6 @@ static inline struct proc_dir_entry *pde
 }
 void pde_put(struct proc_dir_entry *pde);
 
-extern struct vfsmount *proc_mnt;
 int proc_fill_super(struct super_block *);
 struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *);
 
--- 35-rc3/fs/proc/inode.c~PNS_2_KILL_ROOT_MNT	2010-06-19 19:20:23.000000000 +0200
+++ 35-rc3/fs/proc/inode.c	2010-06-19 19:21:39.000000000 +0200
@@ -43,8 +43,6 @@ static void proc_delete_inode(struct ino
 	clear_inode(inode);
 }
 
-struct vfsmount *proc_mnt;
-
 static struct kmem_cache * proc_inode_cachep;
 
 static struct inode *proc_alloc_inode(struct super_block *sb)
--- 35-rc3/fs/proc/root.c~PNS_2_KILL_ROOT_MNT	2010-06-19 19:21:38.000000000 +0200
+++ 35-rc3/fs/proc/root.c	2010-06-19 19:21:39.000000000 +0200
@@ -94,14 +94,15 @@ static struct file_system_type proc_fs_t
 
 void __init proc_root_init(void)
 {
+	struct vfsmount *mnt;
 	int err;
 
 	proc_init_inodecache();
 	err = register_filesystem(&proc_fs_type);
 	if (err)
 		return;
-	proc_mnt = kern_mount_data(&proc_fs_type, &init_pid_ns);
-	if (IS_ERR(proc_mnt)) {
+	mnt = kern_mount_data(&proc_fs_type, &init_pid_ns);
+	if (IS_ERR(mnt)) {
 		unregister_filesystem(&proc_fs_type);
 		return;
 	}

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