[PATCH] fix reservation discarding in affs

- remove affs_put_inode, so preallocations aren't discared unnecessarily
  often.
- remove affs_drop_inode, it's called with a spinlock held, so it can't
  use a mutex.
- make i_opencnt atomic
- avoid direct b_count manipulations
- a few allocation failure fixes, so that these are more gracefully
  handled now.
Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/affs/affs.h

@@ -48,7 +48,7 @@ struct affs_ext_key {
  * affs fs inode data in memory
  */
 struct affs_inode_info {
-	u32	 i_opencnt;
+	atomic_t i_opencnt;
 	struct semaphore i_link_lock;		/* Protects internal inode access. */
 	struct semaphore i_ext_lock;		/* Protects internal inode access. */
 #define i_hash_lock i_ext_lock
@@ -170,8 +170,6 @@ extern int	affs_rename(struct inode *old_dir, struct dentry *old_dentry,
 extern unsigned long		 affs_parent_ino(struct inode *dir);
 extern struct inode		*affs_new_inode(struct inode *dir);
 extern int			 affs_notify_change(struct dentry *dentry, struct iattr *attr);
-extern void			 affs_put_inode(struct inode *inode);
-extern void			 affs_drop_inode(struct inode *inode);
 extern void			 affs_delete_inode(struct inode *inode);
 extern void			 affs_clear_inode(struct inode *inode);
 extern struct inode		*affs_iget(struct super_block *sb,