| #ifndef __LINUX_COMPILER_H |
| #error "Please don't include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead." |
| #endif |
| |
| /* Some compiler specific definitions are overwritten here |
| * for Clang compiler |
| */ |
| |
| #ifdef uninitialized_var |
| #undef uninitialized_var |
| #define uninitialized_var(x) x = *(&(x)) |
| #endif |
| |
| /* same as gcc, this was present in clang-2.6 so we can assume it works |
| * with any version that can compile the kernel |
| */ |
| #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) |
| |
| #undef __no_sanitize_address |
| #define __no_sanitize_address __attribute__((no_sanitize("address"))) |
| |
| /* Clang doesn't have a way to turn it off per-function, yet. */ |
| #ifdef __noretpoline |
| #undef __noretpoline |
| #endif |
| |
| /* |
| * Not all versions of clang implement the the type-generic versions |
| * of the builtin overflow checkers. Fortunately, clang implements |
| * __has_builtin allowing us to avoid awkward version |
| * checks. Unfortunately, we don't know which version of gcc clang |
| * pretends to be, so the macro may or may not be defined. |
| */ |
| #undef COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW |
| #if __has_builtin(__builtin_mul_overflow) && \ |
| __has_builtin(__builtin_add_overflow) && \ |
| __has_builtin(__builtin_sub_overflow) |
| #define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1 |
| #endif |