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- /* 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
- /* Compiler specific definitions 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
- #if __has_feature(address_sanitizer) || __has_feature(hwaddress_sanitizer)
- /* emulate gcc's __SANITIZE_ADDRESS__ flag */
- #define __SANITIZE_ADDRESS__
- #define __no_sanitize_address \
- __attribute__((no_sanitize("address", "hwaddress")))
- #else
- #define __no_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")
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