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-rw-r--r--include/linux/compiler.h7
1 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index ad8c76144a3c..8c0beb10c1dd 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -207,12 +207,15 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val,
# define __no_kasan_or_inline __always_inline
#endif
+#define __no_kcsan __no_sanitize_thread
#ifdef __SANITIZE_THREAD__
/*
* Rely on __SANITIZE_THREAD__ instead of CONFIG_KCSAN, to avoid not inlining in
- * compilation units where instrumentation is disabled.
+ * compilation units where instrumentation is disabled. The attribute 'noinline'
+ * is required for older compilers, where implicit inlining of very small
+ * functions renders __no_sanitize_thread ineffective.
*/
-# define __no_kcsan_or_inline __no_sanitize_thread notrace __maybe_unused
+# define __no_kcsan_or_inline __no_kcsan noinline notrace __maybe_unused
# define __no_sanitize_or_inline __no_kcsan_or_inline
#else
# define __no_kcsan_or_inline __always_inline