[PATCH] uml: restore hppfs support

Some time ago a trivial patch broke HPPFS (one var became a pointer, not
all uses were updated).  It wasn't fixed at that time because not very
used, now it's been requested so I've fixed this, and it has been tested
positively (at least partially).

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/um/Kconfig

@@ -128,7 +128,6 @@ config HOSTFS
 
 config HPPFS
 	tristate "HoneyPot ProcFS (EXPERIMENTAL)"
-	depends on BROKEN
 	help
 	hppfs (HoneyPot ProcFS) is a filesystem which allows UML /proc
 	entries to be overridden, removed, or fabricated from the host.
@@ -141,8 +140,9 @@ config HPPFS
 	You only need this if you are setting up a UML honeypot.  Otherwise,
 	it is safe to say 'N' here.
 
-	If you are actively using it, please ask for it to be fixed. In this
-	moment, it does not work on 2.6 (it works somehow on 2.4).
+	If you are actively using it, please report any problems, since it's
+	getting fixed. In this moment, it is experimental on 2.6 (it works on
+	2.4).
 
 config MCONSOLE
 	bool "Management console"

fs/hppfs/hppfs_kern.c

@@ -4,6 +4,7 @@
  */
 
 #include <linux/fs.h>
+#include <linux/file.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/slab.h>
@@ -491,7 +492,7 @@ static int hppfs_open(struct inode *inode, struct file *file)
 		fd = open_host_sock(host_file, &filter);
 		if(fd > 0){
 			data->contents = hppfs_get_data(fd, filter,
-							&data->proc_file,
+							data->proc_file,
 							file, &data->len);
 			if(!IS_ERR(data->contents))
 				data->host_fd = fd;
@@ -543,7 +544,7 @@ static int hppfs_dir_open(struct inode *inode, struct file *file)
 static loff_t hppfs_llseek(struct file *file, loff_t off, int where)
 {
 	struct hppfs_private *data = file->private_data;
-	struct file *proc_file = &data->proc_file;
+	struct file *proc_file = data->proc_file;
 	loff_t (*llseek)(struct file *, loff_t, int);
 	loff_t ret;
 
@@ -586,7 +587,7 @@ static int hppfs_filldir(void *d, const char *name, int size,
 static int hppfs_readdir(struct file *file, void *ent, filldir_t filldir)
 {
 	struct hppfs_private *data = file->private_data;
-	struct file *proc_file = &data->proc_file;
+	struct file *proc_file = data->proc_file;
 	int (*readdir)(struct file *, void *, filldir_t);
 	struct hppfs_dirent dirent = ((struct hppfs_dirent)
 		                      { .vfs_dirent  	= ent,