procfs: preparations for remove_proc_entry() race fixes

* leave ->proc_fops alone; make ->pde_users negative instead
* trim pde_opener
* move relevant code in fs/proc/inode.c

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 4 insertions, 3 deletions

diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 9c93a53f371d..c43d536f93b9 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -151,12 +151,13 @@ int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
                 filldir_t filldir);
 
 struct pde_opener {
-        struct inode *inode;
         struct file *file;
-        int (*release)(struct inode *, struct file *);
         struct list_head lh;
 };
-void pde_users_dec(struct proc_dir_entry *pde);
+
+ssize_t __proc_file_read(struct file *, char __user *, size_t, loff_t *);
+extern const struct file_operations proc_file_operations;
+void proc_entry_rundown(struct proc_dir_entry *);
 
 extern spinlock_t proc_subdir_lock;