diff options
Diffstat (limited to 'include/linux/compiler.h')
| -rw-r--r-- | include/linux/compiler.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/compiler.h b/include/linux/compiler.h index 174099fdc485..bb1339c7057b 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -228,6 +228,14 @@ static inline void *offset_to_ptr(const int *off) #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) /* + * This returns a constant expression while determining if an argument is + * a constant expression, most importantly without evaluating the argument. + * Glory to Martin Uecker <Martin.Uecker@med.uni-goettingen.de> + */ +#define __is_constexpr(x) \ + (sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8))) + +/* * Whether 'type' is a signed type or an unsigned type. Supports scalar types, * bool and also pointer types. */ |