mconsole_proc(): don't mess with file->f_pos

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

arch/um/drivers/mconsole_kern.c

@@ -130,6 +130,7 @@ void mconsole_proc(struct mc_request *req)
 	struct file *file;
 	int first_chunk = 1;
 	char *ptr = req->request.data;
+	loff_t pos = 0;
 
 	ptr += strlen("proc");
 	ptr = skip_spaces(ptr);
@@ -148,7 +149,7 @@ void mconsole_proc(struct mc_request *req)
 	}
 
 	do {
-		len = kernel_read(file, buf, PAGE_SIZE - 1, &file->f_pos);
+		len = kernel_read(file, buf, PAGE_SIZE - 1, &pos);
 		if (len < 0) {
 			mconsole_reply(req, "Read of file failed", 1, 0);
 			goto out_free;