1 #ifndef __LINUX_COMPILER_H 2 #error "Please don't include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead." 3 #endif 4 5 /* Some compiler specific definitions are overwritten here 6 * for Clang compiler 7 */ 8 9 #ifdef uninitialized_var 10 #undef uninitialized_var 11 #define uninitialized_var(x) x = *(&(x)) 12 #endif 13 14 /* same as gcc, this was present in clang-2.6 so we can assume it works 15 * with any version that can compile the kernel 16 */ 17 #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) 18 19 #ifdef CONFIG_LTO_CLANG 20 #ifdef CONFIG_FTRACE_MCOUNT_RECORD 21 #define __norecordmcount \ 22 __attribute__((__section__(".text..ftrace"))) 23 #endif 24 25 #define __nocfi __attribute__((no_sanitize("cfi"))) 26 #endif 27 28 /* all clang versions usable with the kernel support KASAN ABI version 5 */ 29 #define KASAN_ABI_VERSION 5 30 31 /* emulate gcc's __SANITIZE_ADDRESS__ flag */ 32 #if __has_feature(address_sanitizer) 33 #define __SANITIZE_ADDRESS__ 34 #endif 35 36 /* Clang doesn't have a way to turn it off per-function, yet. */ 37 #ifdef __noretpoline 38 #undef __noretpoline 39 #endif 40