diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/compiler_types.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h index 1280693766b9..280b4ac0990f 100644 --- a/include/linux/compiler_types.h +++ b/include/linux/compiler_types.h @@ -586,6 +586,25 @@ struct ftrace_likely_data { __scalar_type_to_expr_cases(long long), \ default: (x))) +/* + * __signed_scalar_typeof(x) - Declare a signed scalar type, leaving + * non-scalar types unchanged. + */ + +#define __scalar_type_to_signed_cases(type) \ + unsigned type: (signed type)0, \ + signed type: (signed type)0 + +#define __signed_scalar_typeof(x) typeof( \ + _Generic((x), \ + char: (signed char)0, \ + __scalar_type_to_signed_cases(char), \ + __scalar_type_to_signed_cases(short), \ + __scalar_type_to_signed_cases(int), \ + __scalar_type_to_signed_cases(long), \ + __scalar_type_to_signed_cases(long long), \ + default: (x))) + /* Is this type a native word size -- useful for atomic operations */ #define __native_word(t) \ (sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \ |