Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2025-01-19 14:56:21 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

kcsan: Improve some Kconfig comments

Browse Source 
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>
This commit is contained in:
Marco Elver 2021-06-07 14:56:47 +02:00 committed by Paul E. McKenney
parent 2734d6c1b1
commit eb32f9f990
1 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
lib/Kconfig.kcsan
View File

@ -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"