1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __LINUX_COMPILER_TYPES_H
3 #error "Please don't include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead."
6 /* Some compiler specific definitions are overwritten here
9 #define uninitialized_var(x) x = *(&(x))
11 /* same as gcc, this was present in clang-2.6 so we can assume it works
12 * with any version that can compile the kernel
14 #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
16 /* all clang versions usable with the kernel support KASAN ABI version 5 */
17 #define KASAN_ABI_VERSION 5
19 #if __has_feature(address_sanitizer) || __has_feature(hwaddress_sanitizer)
20 /* emulate gcc's __SANITIZE_ADDRESS__ flag */
21 #define __SANITIZE_ADDRESS__
22 #define __no_sanitize_address \
23 __attribute__((no_sanitize("address", "hwaddress")))
25 #define __no_sanitize_address
29 * Not all versions of clang implement the the type-generic versions
30 * of the builtin overflow checkers. Fortunately, clang implements
31 * __has_builtin allowing us to avoid awkward version
32 * checks. Unfortunately, we don't know which version of gcc clang
33 * pretends to be, so the macro may or may not be defined.
35 #if __has_builtin(__builtin_mul_overflow) && \
36 __has_builtin(__builtin_add_overflow) && \
37 __has_builtin(__builtin_sub_overflow)
38 #define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1
41 /* The following are for compatibility with GCC, from compiler-gcc.h,
42 * and may be redefined here because they should not be shared with other
43 * compilers, like ICC.
45 #define barrier() __asm__ __volatile__("" : : : "memory")