proc: ->low_ino cleanup

- ->low_ino is write-once field -- reading it under locks is unnecessary.

- /proc/$PID stuff never reaches pde_put()/free_proc_entry() --
   PROC_DYNAMIC_FIRST check never triggers.

- in proc_get_inode(), inode number always matches proc dir entry, so
  save one parameter.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 4 deletions

diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 6bcb926b101b..176ce4cda68a 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -416,12 +416,11 @@ static const struct file_operations proc_reg_file_ops_no_compat = {
 };
 #endif
 
-struct inode *proc_get_inode(struct super_block *sb, unsigned int ino,
-                                struct proc_dir_entry *de)
+struct inode *proc_get_inode(struct super_block *sb, struct proc_dir_entry *de)
 {
         struct inode * inode;
 
-        inode = iget_locked(sb, ino);
+        inode = iget_locked(sb, de->low_ino);
         if (!inode)
                 return NULL;
         if (inode->i_state & I_NEW) {
@@ -471,7 +470,7 @@ int proc_fill_super(struct super_block *s)
         s->s_time_gran = 1;
         
         pde_get(&proc_root);
-        root_inode = proc_get_inode(s, PROC_ROOT_INO, &proc_root);
+        root_inode = proc_get_inode(s, &proc_root);
         if (!root_inode)
                 goto out_no_root;
         root_inode->i_uid = 0;