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| author | Marco Elver <elver@google.com> | 2021-06-07 14:56:47 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2021-07-20 22:49:43 +0200 |
| commit | eb32f9f990d974a7878a8792cee9bb821720c24b (patch) | |
| tree | f2e5010af8f10b09d4f639ca950fe28836ca0bc2 /lib/Kconfig.kcsan | |
| parent | Linux 5.14-rc2 (diff) | |
| download | linux-eb32f9f990d974a7878a8792cee9bb821720c24b.tar.xz linux-eb32f9f990d974a7878a8792cee9bb821720c24b.zip | |
kcsan: Improve some Kconfig comments
Improve comment for CC_HAS_TSAN_COMPOUND_READ_BEFORE_WRITE. Also shorten
the comment above the "strictness" configuration options.
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'lib/Kconfig.kcsan')
| -rw-r--r-- | lib/Kconfig.kcsan | 16 |
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" |