1 #define __user __attribute__((address_space(1)))
2 
3 typedef unsigned long ulong;
4 typedef struct s obj_t;
5 
expl(ulong u,void * v,obj_t * o,obj_t __user * p)6 static void expl(ulong u, void *v, obj_t *o, obj_t __user *p)
7 {
8 	(obj_t*)(u);
9 	(obj_t __user*)(u);
10 
11 	(obj_t*)(v);
12 	(obj_t __user*)(v);
13 
14 	(ulong)(o);
15 	(void *)(o);
16 	(obj_t*)(o);
17 	(obj_t __user*)(o);
18 
19 	(ulong)(p);		// w!
20 	(void *)(p);		// w
21 	(obj_t*)(p);		// w
22 	(obj_t __user*)(p);	// ok
23 }
24 
25 /*
26  * check-name: Waddress-space-strict
27  * check-command: sparse -Wcast-from-as -Wcast-to-as $file
28  *
29  * check-error-start
30 Waddress-space-strict.c:12:10: warning: cast adds address space '<asn:1>' to expression
31 Waddress-space-strict.c:17:10: warning: cast adds address space '<asn:1>' to expression
32 Waddress-space-strict.c:19:10: warning: cast removes address space '<asn:1>' of expression
33 Waddress-space-strict.c:20:10: warning: cast removes address space '<asn:1>' of expression
34 Waddress-space-strict.c:21:10: warning: cast removes address space '<asn:1>' of expression
35  * check-error-end
36  */
37