Re: [PATCH 3/3] procfs: kill the global proc_mnt variable

["Serge E. Hallyn" <serge.hallyn@canonical.com>]

Quoting Daniel Lezcano (daniel.lezcano@free.fr):
> From: Oleg Nesterov <oleg@redhat.com>
> 
> 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@redhat.com>
> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@free.fr>

Acked-by: Serge E. Hallyn <serge@hallyn.com>

> ---
>  fs/proc/inode.c    |    2 --
>  fs/proc/internal.h |    1 -
>  fs/proc/root.c     |    7 ++++---
>  3 files changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/fs/proc/inode.c b/fs/proc/inode.c
> index 176ce4c..ee0f802 100644
> --- a/fs/proc/inode.c
> +++ b/fs/proc/inode.c
> @@ -42,8 +42,6 @@ static void proc_evict_inode(struct inode *inode)
>  		sysctl_head_put(PROC_I(inode)->sysctl);
>  }
>  
> -struct vfsmount *proc_mnt;
> -
>  static struct kmem_cache * proc_inode_cachep;
>  
>  static struct inode *proc_alloc_inode(struct super_block *sb)
> diff --git a/fs/proc/internal.h b/fs/proc/internal.h
> index 9ad561d..c03e8d3 100644
> --- a/fs/proc/internal.h
> +++ b/fs/proc/internal.h
> @@ -107,7 +107,6 @@ static inline struct proc_dir_entry *pde_get(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 *, struct proc_dir_entry *);
>  
> diff --git a/fs/proc/root.c b/fs/proc/root.c
> index e5e2bfa..a9000e9 100644
> --- a/fs/proc/root.c
> +++ b/fs/proc/root.c
> @@ -90,19 +90,20 @@ static struct file_system_type proc_fs_type = {
>  
>  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;
>  	}
>  
> -	init_pid_ns.proc_mnt = proc_mnt;
> +	init_pid_ns.proc_mnt = mnt;
>  	proc_symlink("mounts", NULL, "self/mounts");
>  
>  	proc_net_init();
> -- 
> 1.7.1
> 
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