include/linux/compiler-clang.h

   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."
   4 #endif
   5
   6 /* Some compiler specific definitions are overwritten here
   7  * for Clang compiler
   8  */
   9
  10 #ifdef uninitialized_var
  11 #undef uninitialized_var
  12 #define uninitialized_var(x) x = *(&(x))
  13 #endif
  14
  15 /* same as gcc, this was present in clang-2.6 so we can assume it works
  16  * with any version that can compile the kernel
  17  */
  18 #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
  19
  20 /* Clang doesn't have a way to turn it off per-function, yet. */
  21 #ifdef __noretpoline
  22 #undef __noretpoline
  23 #endif
  24
  25 #ifdef CONFIG_LTO_CLANG
  26 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
  27 #define __norecordmcount \
  28         __attribute__((__section__(".text..ftrace")))
  29 #endif
  30
  31 #define __nocfi         __attribute__((no_sanitize("cfi")))
  32 #endif
  33
  34 /* all clang versions usable with the kernel support KASAN ABI version 5 */
  35 #define KASAN_ABI_VERSION 5
  36
  37 /* emulate gcc's __SANITIZE_ADDRESS__ flag */
  38 #if __has_feature(address_sanitizer)
  39 #define __SANITIZE_ADDRESS__
  40 #endif