diff options
| -rw-r--r-- | include/asm-generic/global_data.h | 5 | ||||
| -rw-r--r-- | include/linux/build_bug.h | 19 |
2 files changed, 24 insertions, 0 deletions
diff --git a/include/asm-generic/global_data.h b/include/asm-generic/global_data.h index e278d4c9413..5fed4db23f1 100644 --- a/include/asm-generic/global_data.h +++ b/include/asm-generic/global_data.h @@ -23,6 +23,8 @@ #include <fdtdec.h> #include <membuff.h> #include <linux/list.h> +#include <linux/build_bug.h> +#include <asm-offsets.h> struct acpi_ctx; struct driver_rt; @@ -464,6 +466,9 @@ struct global_data { char *smbios_version; #endif }; +#ifndef DO_DEPS_ONLY +static_assert(sizeof(struct global_data) == GD_SIZE); +#endif /** * gd_board_type() - retrieve board type diff --git a/include/linux/build_bug.h b/include/linux/build_bug.h index b7d22d60008..9c7088bafa4 100644 --- a/include/linux/build_bug.h +++ b/include/linux/build_bug.h @@ -79,6 +79,25 @@ */ #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed") +/** + * static_assert - check integer constant expression at build time + * + * static_assert() is a wrapper for the C11 _Static_assert, with a + * little macro magic to make the message optional (defaulting to the + * stringification of the tested expression). + * + * Contrary to BUILD_BUG_ON(), static_assert() can be used at global + * scope, but requires the expression to be an integer constant + * expression (i.e., it is not enough that __builtin_constant_p() is + * true for expr). + * + * Also note that BUILD_BUG_ON() fails the build if the condition is + * true, while static_assert() fails the build if the expression is + * false. + */ +#define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) +#define __static_assert(expr, msg, ...) _Static_assert(expr, msg) + #endif /* __CHECKER__ */ #endif /* _LINUX_BUILD_BUG_H */ |