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-rw-r--r--scripts/Makefile.kcsan11
1 files changed, 10 insertions, 1 deletions
diff --git a/scripts/Makefile.kcsan b/scripts/Makefile.kcsan
index caf1111a28ae..20337a7ecf54 100644
--- a/scripts/Makefile.kcsan
+++ b/scripts/Makefile.kcsan
@@ -1,6 +1,15 @@
# SPDX-License-Identifier: GPL-2.0
ifdef CONFIG_KCSAN
-CFLAGS_KCSAN := -fsanitize=thread
+# GCC and Clang accept backend options differently. Do not wrap in cc-option,
+# because Clang accepts "--param" even if it is unused.
+ifdef CONFIG_CC_IS_CLANG
+cc-param = -mllvm -$(1)
+else
+cc-param = --param -$(1)
+endif
+
+CFLAGS_KCSAN := -fsanitize=thread \
+ $(call cc-option,$(call cc-param,tsan-instrument-func-entry-exit=0) -fno-optimize-sibling-calls)
endif # CONFIG_KCSAN