fs/9p: change simple_strtol to simple_strtoul

Author: Julia Lawall <julia@diku.dk>

Since v9ses->uid is unsigned, it would seem better to use simple_strtoul that
simple_strtol.

A simplified version of the semantic patch that makes this change is as
follows: (http://www.emn.fr/x-info/coccinelle/)

// 
@r2@
long e;
position p;
@@

e = simple_strtol@p(...)

@@
position p != r2.p;
type T;
T e;
@@

e =
- simple_strtol@p
+ simple_strtoul
  (...)
// 

Signed-off-by: Julia Lawall 
Acked-by: Eric Van Hensbergen 

---
 fs/9p/v9fs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index 24eb010..332b5ff0 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -160,7 +160,7 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses)
 				v9ses->flags |= V9FS_ACCESS_ANY;
 			else {
 				v9ses->flags |= V9FS_ACCESS_SINGLE;
-				v9ses->uid = simple_strtol(s, &e, 10);
+				v9ses->uid = simple_strtoul(s, &e, 10);
 				if (*e != '\0')
 					v9ses->uid = ~0;
 			}