proc: remove/Fix proc generic d_revalidate

[linux-2.6-omap-h63xx.git] / fs / proc / generic.c

diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index b5e7155d30d8e60724dc3807507a1b67f7acbd56..6a2fe5187b6265db0c896aa9e68ec6fb7507a3a4 100644 (file)
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -74,7 +74,7 @@ proc_file_read(struct file *file, char __user *buf, size_t nbytes,
                nbytes = MAX_NON_LFS - pos;
 
        dp = PDE(inode);
-       if (!(page = (char*) __get_free_page(GFP_KERNEL)))
+       if (!(page = (char*) __get_free_page(GFP_TEMPORARY)))
                return -ENOMEM;
 
        while ((nbytes > 0) && !eof) {
@@ -397,8 +397,11 @@ struct dentry *proc_lookup(struct inode * dir, struct dentry *dentry, struct nam
                        if (de->namelen != dentry->d_name.len)
                                continue;
                        if (!memcmp(dentry->d_name.name, de->name, de->namelen)) {
-                               unsigned int ino = de->low_ino;
+                               unsigned int ino;
 
+                               if (de->shadow_proc)
+                                       de = de->shadow_proc(current, de);
+                               ino = de->low_ino;
                                de_get(de);
                                spin_unlock(&proc_subdir_lock);
                                error = -EINVAL;
@@ -555,36 +558,6 @@ static int proc_register(struct proc_dir_entry * dir, struct proc_dir_entry * dp
        return 0;
 }
 
-/*
- * Kill an inode that got unregistered..
- */
-static void proc_kill_inodes(struct proc_dir_entry *de)
-{
-       struct list_head *p;
-       struct super_block *sb = proc_mnt->mnt_sb;
-
-       /*
-        * Actually it's a partial revoke().
-        */
-       file_list_lock();
-       list_for_each(p, &sb->s_files) {
-               struct file * filp = list_entry(p, struct file, f_u.fu_list);
-               struct dentry * dentry = filp->f_path.dentry;
-               struct inode * inode;
-               const struct file_operations *fops;
-
-               if (dentry->d_op != &proc_dentry_operations)
-                       continue;
-               inode = dentry->d_inode;
-               if (PDE(inode) != de)
-                       continue;
-               fops = filp->f_op;
-               filp->f_op = NULL;
-               fops_put(fops);
-       }
-       file_list_unlock();
-}
-
 static struct proc_dir_entry *proc_create(struct proc_dir_entry **parent,
                                          const char *name,
                                          mode_t mode,
@@ -615,6 +588,7 @@ static struct proc_dir_entry *proc_create(struct proc_dir_entry **parent,
        ent->namelen = len;
        ent->mode = mode;
        ent->nlink = nlink;
+       atomic_set(&ent->count, 1);
        ent->pde_users = 0;
        spin_lock_init(&ent->pde_unload_lock);
        ent->pde_unload_completion = NULL;
@@ -712,7 +686,6 @@ void free_proc_entry(struct proc_dir_entry *de)
 
 /*
  * Remove a /proc entry and free it if it's not currently in use.
- * If it is in use, we set the 'deleted' flag.
  */
 void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
 {
@@ -759,17 +732,10 @@ void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
 continue_removing:
                if (S_ISDIR(de->mode))
                        parent->nlink--;
-               if (!S_ISREG(de->mode))
-                       proc_kill_inodes(de);
                de->nlink = 0;
                WARN_ON(de->subdir);
-               if (!atomic_read(&de->count))
+               if (atomic_dec_and_test(&de->count))
                        free_proc_entry(de);
-               else {
-                       de->deleted = 1;
-                       printk("remove_proc_entry: %s/%s busy, count=%d\n",
-                               parent->name, de->name, atomic_read(&de->count));
-               }
                break;
        }
        spin_unlock(&proc_subdir_lock);