| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef __LINUX_COMPILER_TYPES_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 |
| */ |
| #define uninitialized_var(x) x = *(&(x)) |
| |
| /* 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__) |
| |
| /* all clang versions usable with the kernel support KASAN ABI version 5 */ |
| #define KASAN_ABI_VERSION 5 |
| |
| /* emulate gcc's __SANITIZE_ADDRESS__ flag */ |
| #if __has_feature(address_sanitizer) |
| #define __SANITIZE_ADDRESS__ |
| #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. |
| */ |
| #if __has_builtin(__builtin_mul_overflow) && \ |
| __has_builtin(__builtin_add_overflow) && \ |
| __has_builtin(__builtin_sub_overflow) |
| #define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1 |
| #endif |
| |
| /* The following are for compatibility with GCC, from compiler-gcc.h, |
| * and may be redefined here because they should not be shared with other |
| * compilers, like ICC. |
| */ |
| #define barrier() __asm__ __volatile__("" : : : "memory") |