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@redhat.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@free.fr>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Serge E. Hallyn <serge@hallyn.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 4 insertions, 6 deletions

diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index d6a7ca1fdac5..d15aa1b1cc8f 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -46,8 +46,6 @@ static void proc_evict_inode(struct inode *inode)
         }
 }
 
-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 9ad561ded409..c03e8d3a3a5b 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 e5e2bfa7a03b..a9000e9cfee5 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();