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proc: rename de_get() to pde_get() and inline it 

* de_get() is trivial -- make inline, save a few bits of code, drop
  "refcount is 0" check -- it should be done in some generic refcount
  code, don't recall it's was helpful

* rename GET and PUT functions to pde_get(), pde_put() for cool prefix!

* remove obvious and incorrent comments

* in remove_proc_entry() use pde_put(), when I fixed PDE refcounting to
  be normal one, remove_proc_entry() was supposed to do "-1" and code now
  reflects that.

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 2009-12-15 16:45:39 -08:00 committed by Linus Torvalds
parent f065f41f48
commit 135d5655dc
3 changed files with 23 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
fs/proc/generic.c
View File

@ -429,7 +429,7 @@ struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *dir,
unsigned int ino;
ino = de->low_ino;
de_get(de);
pde_get(de);
spin_unlock(&proc_subdir_lock);
error = -EINVAL;
inode = proc_get_inode(dir->i_sb, ino, de);
@ -445,7 +445,7 @@ out_unlock:
return NULL;
}
if (de)
de_put(de);
pde_put(de);
return ERR_PTR(error);
}
@ -509,17 +509,17 @@ int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
struct proc_dir_entry *next;
/* filldir passes info to user space */
de_get(de);
pde_get(de);
spin_unlock(&proc_subdir_lock);
if (filldir(dirent, de->name, de->namelen, filp->f_pos,
de->low_ino, de->mode >> 12) < 0) {
de_put(de);
pde_put(de);
goto out;
}
spin_lock(&proc_subdir_lock);
filp->f_pos++;
next = de->next;
de_put(de);
pde_put(de);
de = next;
} while (de);
spin_unlock(&proc_subdir_lock);
@ -763,7 +763,7 @@ out:
return NULL;
}
void free_proc_entry(struct proc_dir_entry *de)
static void free_proc_entry(struct proc_dir_entry *de)
{
unsigned int ino = de->low_ino;
@ -777,6 +777,12 @@ void free_proc_entry(struct proc_dir_entry *de)
kfree(de);
}
void pde_put(struct proc_dir_entry *pde)
{
if (atomic_dec_and_test(&pde->count))
free_proc_entry(pde);
}
/*
* Remove a /proc entry and free it if it's not currently in use.
*/
@ -845,6 +851,5 @@ continue_removing:
WARN(de->subdir, KERN_WARNING "%s: removing non-empty directory "
"'%s/%s', leaking at least '%s'\n", __func__,
de->parent->name, de->name, de->subdir->name);
if (atomic_dec_and_test(&de->count))
free_proc_entry(de);
pde_put(de);
}

31
fs/proc/inode.c
View File

@ -24,29 +24,6 @@
#include "internal.h"
struct proc_dir_entry *de_get(struct proc_dir_entry *de)
{
atomic_inc(&de->count);
return de;
}
/*
* Decrements the use count and checks for deferred deletion.
*/
void de_put(struct proc_dir_entry *de)
{
if (!atomic_read(&de->count)) {
printk("de_put: entry %s already free!\n", de->name);
return;
}
if (atomic_dec_and_test(&de->count))
free_proc_entry(de);
}
/*
* Decrement the use count of the proc_dir_entry.
*/
static void proc_delete_inode(struct inode *inode)
{
struct proc_dir_entry *de;
@ -59,7 +36,7 @@ static void proc_delete_inode(struct inode *inode)
/* Let go of any associated proc directory entry */
de = PROC_I(inode)->pde;
if (de)
de_put(de);
pde_put(de);
if (PROC_I(inode)->sysctl)
sysctl_head_put(PROC_I(inode)->sysctl);
clear_inode(inode);
@ -480,7 +457,7 @@ struct inode *proc_get_inode(struct super_block *sb, unsigned int ino,
}
unlock_new_inode(inode);
} else
de_put(de);
pde_put(de);
return inode;
}
@ -495,7 +472,7 @@ int proc_fill_super(struct super_block *s)
s->s_op = &proc_sops;
s->s_time_gran = 1;
de_get(&proc_root);
pde_get(&proc_root);
root_inode = proc_get_inode(s, PROC_ROOT_INO, &proc_root);
if (!root_inode)
goto out_no_root;
@ -509,6 +486,6 @@ int proc_fill_super(struct super_block *s)
out_no_root:
printk("proc_read_super: get root inode failed\n");
iput(root_inode);
de_put(&proc_root);
pde_put(&proc_root);
return -ENOMEM;
}

10
fs/proc/internal.h
View File

@ -61,8 +61,6 @@ extern const struct file_operations proc_pagemap_operations;
extern const struct file_operations proc_net_operations;
extern const struct inode_operations proc_net_inode_operations;
void free_proc_entry(struct proc_dir_entry *de);
void proc_init_inodecache(void);
static inline struct pid *proc_pid(struct inode *inode)
@ -101,8 +99,12 @@ unsigned long task_vsize(struct mm_struct *);
int task_statm(struct mm_struct *, int *, int *, int *, int *);
void task_mem(struct seq_file *, struct mm_struct *);
struct proc_dir_entry *de_get(struct proc_dir_entry *de);
void de_put(struct proc_dir_entry *de);
static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde)
{
atomic_inc(&pde->count);
return pde;
}
void pde_put(struct proc_dir_entry *pde);
extern struct vfsmount *proc_mnt;
int proc_fill_super(struct super_block *);