diff options
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/kernel.h | 21 | ||||
-rw-r--r-- | include/linux/typecheck.h | 24 |
2 files changed, 25 insertions, 20 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index f9cd7a513f9c..5c4b1251e110 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h | |||
@@ -14,6 +14,7 @@ | |||
14 | #include <linux/compiler.h> | 14 | #include <linux/compiler.h> |
15 | #include <linux/bitops.h> | 15 | #include <linux/bitops.h> |
16 | #include <linux/log2.h> | 16 | #include <linux/log2.h> |
17 | #include <linux/typecheck.h> | ||
17 | #include <asm/byteorder.h> | 18 | #include <asm/byteorder.h> |
18 | #include <asm/bug.h> | 19 | #include <asm/bug.h> |
19 | 20 | ||
@@ -441,26 +442,6 @@ static inline char *pack_hex_byte(char *buf, u8 byte) | |||
441 | const typeof( ((type *)0)->member ) *__mptr = (ptr); \ | 442 | const typeof( ((type *)0)->member ) *__mptr = (ptr); \ |
442 | (type *)( (char *)__mptr - offsetof(type,member) );}) | 443 | (type *)( (char *)__mptr - offsetof(type,member) );}) |
443 | 444 | ||
444 | /* | ||
445 | * Check at compile time that something is of a particular type. | ||
446 | * Always evaluates to 1 so you may use it easily in comparisons. | ||
447 | */ | ||
448 | #define typecheck(type,x) \ | ||
449 | ({ type __dummy; \ | ||
450 | typeof(x) __dummy2; \ | ||
451 | (void)(&__dummy == &__dummy2); \ | ||
452 | 1; \ | ||
453 | }) | ||
454 | |||
455 | /* | ||
456 | * Check at compile time that 'function' is a certain type, or is a pointer | ||
457 | * to that type (needs to use typedef for the function type.) | ||
458 | */ | ||
459 | #define typecheck_fn(type,function) \ | ||
460 | ({ typeof(type) __tmp = function; \ | ||
461 | (void)__tmp; \ | ||
462 | }) | ||
463 | |||
464 | struct sysinfo; | 445 | struct sysinfo; |
465 | extern int do_sysinfo(struct sysinfo *info); | 446 | extern int do_sysinfo(struct sysinfo *info); |
466 | 447 | ||
diff --git a/include/linux/typecheck.h b/include/linux/typecheck.h new file mode 100644 index 000000000000..eb5b74a575be --- /dev/null +++ b/include/linux/typecheck.h | |||
@@ -0,0 +1,24 @@ | |||
1 | #ifndef TYPECHECK_H_INCLUDED | ||
2 | #define TYPECHECK_H_INCLUDED | ||
3 | |||
4 | /* | ||
5 | * Check at compile time that something is of a particular type. | ||
6 | * Always evaluates to 1 so you may use it easily in comparisons. | ||
7 | */ | ||
8 | #define typecheck(type,x) \ | ||
9 | ({ type __dummy; \ | ||
10 | typeof(x) __dummy2; \ | ||
11 | (void)(&__dummy == &__dummy2); \ | ||
12 | 1; \ | ||
13 | }) | ||
14 | |||
15 | /* | ||
16 | * Check at compile time that 'function' is a certain type, or is a pointer | ||
17 | * to that type (needs to use typedef for the function type.) | ||
18 | */ | ||
19 | #define typecheck_fn(type,function) \ | ||
20 | ({ typeof(type) __tmp = function; \ | ||
21 | (void)__tmp; \ | ||
22 | }) | ||
23 | |||
24 | #endif /* TYPECHECK_H_INCLUDED */ | ||