1 typedef unsigned int u32;
2 typedef u32 __attribute__((bitwise)) __be32;
3 
4 /* Implicit casts of 0, legal */
5 static __be32 foo(void)
6 {
7 	__be32 x = 0;
8 
9 	return 0;
10 }
11 
12 /* Explicit cast of 0, legal */
13 static __be32 bar(void)
14 {
15 	return (__be32)0;
16 }
17 
18 /* Implicit casts of nonzero, bad */
19 static __be32 baz(void)
20 {
21 	__be32 x = 0x2a;
22 
23 	return 99;
24 }
25 
26 /* Explicit cast of nonzero, bad */
27 static __be32 quux(void)
28 {
29 	return (__be32)1729;
30 }
31 
32 /*
33  * check-name: conversions to bitwise types
34  * check-command: sparse -Wbitwise $file
35  * check-error-start
36 bitwise-cast.c:21:20: warning: incorrect type in initializer (different base types)
37 bitwise-cast.c:21:20:    expected restricted __be32 [usertype] x
38 bitwise-cast.c:21:20:    got int
39 bitwise-cast.c:23:16: warning: incorrect type in return expression (different base types)
40 bitwise-cast.c:23:16:    expected restricted __be32
41 bitwise-cast.c:23:16:    got int
42 bitwise-cast.c:29:17: warning: cast to restricted __be32
43  * check-error-end
44  */
45