1 files changed, 15 insertions, 1 deletions

diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index 0444b1336268..76e28c229805 100644
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -116,11 +116,13 @@
  */
 #define __pure                  __attribute__((pure))
 #define __aligned(x)            __attribute__((aligned(x)))
+#define __aligned_largest       __attribute__((aligned))
 #define __printf(a, b)          __attribute__((format(printf, a, b)))
 #define __scanf(a, b)           __attribute__((format(scanf, a, b)))
 #define __attribute_const__     __attribute__((__const__))
 #define __maybe_unused          __attribute__((unused))
 #define __always_unused         __attribute__((unused))
+#define __mode(x)               __attribute__((mode(x)))
 
 /* gcc version specific checks */
 
@@ -195,6 +197,17 @@
 #endif
 #endif
 
+#ifdef CONFIG_STACK_VALIDATION
+#define annotate_unreachable() ({                                       \
+        asm("%c0:\t\n"                                                  \
+            ".pushsection __unreachable, \"a\"\t\n"                     \
+            ".long %c0b\t\n"                                            \
+            ".popsection\t\n" : : "i" (__LINE__));                      \
+})
+#else
+#define annotate_unreachable()
+#endif
+
 /*
  * Mark a position in code as unreachable.  This can be used to
  * suppress control flow warnings after asm blocks that transfer
@@ -204,7 +217,8 @@
  * this in the preprocessor, but we can live with this because they're
  * unreleased.  Really, we need to have autoconf for the kernel.
  */
-#define unreachable() __builtin_unreachable()
+#define unreachable() \
+        do { annotate_unreachable(); __builtin_unreachable(); } while (0)
 
 /* Mark a function definition as prohibited from being cloned. */
 #define __noclone       __attribute__((__noclone__, __optimize__("no-tracer")))