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-rw-r--r--lib/Kconfig.kcsan16
1 files changed, 8 insertions, 8 deletions
diff --git a/lib/Kconfig.kcsan b/lib/Kconfig.kcsan
index 0440f373248e..6152fbd5cbb4 100644
--- a/lib/Kconfig.kcsan
+++ b/lib/Kconfig.kcsan
@@ -40,10 +40,14 @@ menuconfig KCSAN
if KCSAN
-# Compiler capabilities that should not fail the test if they are unavailable.
config CC_HAS_TSAN_COMPOUND_READ_BEFORE_WRITE
def_bool (CC_IS_CLANG && $(cc-option,-fsanitize=thread -mllvm -tsan-compound-read-before-write=1)) || \
(CC_IS_GCC && $(cc-option,-fsanitize=thread --param tsan-compound-read-before-write=1))
+ help
+ The compiler instruments plain compound read-write operations
+ differently (++, --, +=, -=, |=, &=, etc.), which allows KCSAN to
+ distinguish them from other plain accesses. This is currently
+ supported by Clang 12 or later.
config KCSAN_VERBOSE
bool "Show verbose reports with more information about system state"
@@ -169,13 +173,9 @@ config KCSAN_REPORT_ONCE_IN_MS
reporting to avoid flooding the console with reports. Setting this
to 0 disables rate limiting.
-# The main purpose of the below options is to control reported data races (e.g.
-# in fuzzer configs), and are not expected to be switched frequently by other
-# users. We could turn some of them into boot parameters, but given they should
-# not be switched normally, let's keep them here to simplify configuration.
-#
-# The defaults below are chosen to be very conservative, and may miss certain
-# bugs.
+# The main purpose of the below options is to control reported data races, and
+# are not expected to be switched frequently by non-testers or at runtime.
+# The defaults are chosen to be conservative, and can miss certain bugs.
config KCSAN_REPORT_RACE_UNKNOWN_ORIGIN
bool "Report races of unknown origin"