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| author | Ingo Molnar <mingo@kernel.org> | 2020-10-09 09:35:01 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-10-09 09:56:02 +0300 |
| commit | d6c4c11348816fb4d16e33bf47d559d7aa59350a (patch) | |
| tree | 14d6c6a8d7b88b4f06647717320562b6e525668a /include/asm-generic/bitops/instrumented-atomic.h | |
| parent | e705d397965811ac528d7213b42d74ffe43caf38 (diff) | |
| parent | cd290ec24633f51029dab0d25505fae7da0e1eda (diff) | |
| download | linux-d6c4c11348816fb4d16e33bf47d559d7aa59350a.tar.xz | |
Merge branch 'kcsan' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into locking/core
Pull KCSAN updates for v5.10 from Paul E. McKenney:
- Improve kernel messages.
- Be more permissive with bitops races under KCSAN_ASSUME_PLAIN_WRITES_ATOMIC=y.
- Optimize debugfs stat counters.
- Introduce the instrument_*read_write() annotations, to provide a
finer description of certain ops - using KCSAN's compound instrumentation.
Use them for atomic RNW and bitops, where appropriate.
Doing this might find new races.
(Depends on the compiler having tsan-compound-read-before-write=1 support.)
- Support atomic built-ins, which will help certain architectures, such as s390.
- Misc enhancements and smaller fixes.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/asm-generic/bitops/instrumented-atomic.h')
| -rw-r--r-- | include/asm-generic/bitops/instrumented-atomic.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/asm-generic/bitops/instrumented-atomic.h b/include/asm-generic/bitops/instrumented-atomic.h index fb2cb33a4013..81915dcd4b4e 100644 --- a/include/asm-generic/bitops/instrumented-atomic.h +++ b/include/asm-generic/bitops/instrumented-atomic.h @@ -67,7 +67,7 @@ static inline void change_bit(long nr, volatile unsigned long *addr) */ static inline bool test_and_set_bit(long nr, volatile unsigned long *addr) { - instrument_atomic_write(addr + BIT_WORD(nr), sizeof(long)); + instrument_atomic_read_write(addr + BIT_WORD(nr), sizeof(long)); return arch_test_and_set_bit(nr, addr); } @@ -80,7 +80,7 @@ static inline bool test_and_set_bit(long nr, volatile unsigned long *addr) */ static inline bool test_and_clear_bit(long nr, volatile unsigned long *addr) { - instrument_atomic_write(addr + BIT_WORD(nr), sizeof(long)); + instrument_atomic_read_write(addr + BIT_WORD(nr), sizeof(long)); return arch_test_and_clear_bit(nr, addr); } @@ -93,7 +93,7 @@ static inline bool test_and_clear_bit(long nr, volatile unsigned long *addr) */ static inline bool test_and_change_bit(long nr, volatile unsigned long *addr) { - instrument_atomic_write(addr + BIT_WORD(nr), sizeof(long)); + instrument_atomic_read_write(addr + BIT_WORD(nr), sizeof(long)); return arch_test_and_change_bit(nr, addr); } |