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proc: ->low_ino cleanup

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- ->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>
This commit is contained in:
Alexey Dobriyan
2011-01-12 17:00:33 -08:00
committed by Linus Torvalds
parent 9d6de12f70
commit 6d1b6e4eff
3 changed files with 6 additions and 15 deletions
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7
fs/proc/inode.c
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@@ -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;