compiler: introduce __no_sanitize_address_or_inline

Due to conflict between kasan instrumentation and inlining
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67368 functions which are
defined as inline could not be called from functions defined with
__no_sanitize_address.

Introduce __no_sanitize_address_or_inline which would expand to
__no_sanitize_address when the kernel is built with kasan support and
to inline otherwise. This helps to avoid disabling kasan
instrumentation for entire files.

Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index 763bbad1e258048d9ea3e32764f4a79b8c5b59fb..997ade08a79de47a8dc55af98431c415c7563f61 100644 (file)
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -208,6 +208,12 @@
  * Conflicts with inlining: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67368
  */
 #define __no_sanitize_address __attribute__((no_sanitize_address))
+#ifdef CONFIG_KASAN
+#define __no_sanitize_address_or_inline                                        \
+       __no_sanitize_address __maybe_unused notrace
+#else
+#define __no_sanitize_address_or_inline inline
+#endif
 #endif
 
 #if GCC_VERSION >= 50100
@@ -225,6 +231,7 @@
 
 #if !defined(__no_sanitize_address)
 #define __no_sanitize_address
+#define __no_sanitize_address_or_inline inline
 #endif
 
 /*