diff options
| author |   Marco Elver <elver@google.com> | 2020-07-24 09:00:04 +0200 |
|---|---|---|
| committer |   Paul E. McKenney <paulmck@kernel.org> | 2020-08-24 15:09:57 -0700 |
| commit | 9d1335cc1e97cc3da0d14f640dd716e614083e8b (patch) | |
| tree | 8302683fcef75306910ab0b66df1f4c788eb37a6 /kernel/kcsan | |
| parent | kcsan: Skew delay to be longer for certain access types (diff) | |
| download | linux-dev-9d1335cc1e97cc3da0d14f640dd716e614083e8b.tar.xz linux-dev-9d1335cc1e97cc3da0d14f640dd716e614083e8b.zip | |
kcsan: Add missing CONFIG_KCSAN_IGNORE_ATOMICS checks
Add missing CONFIG_KCSAN_IGNORE_ATOMICS checks for the builtin atomics
instrumentation.
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/kcsan')
| -rw-r--r-- | kernel/kcsan/core.c | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/kernel/kcsan/core.c b/kernel/kcsan/core.c index 95a364e22aab..99e5044bc942 100644 --- a/kernel/kcsan/core.c +++ b/kernel/kcsan/core.c @@ -914,14 +914,19 @@ EXPORT_SYMBOL(__tsan_init); u##bits __tsan_atomic##bits##_load(const u##bits *ptr, int memorder); \ u##bits __tsan_atomic##bits##_load(const u##bits *ptr, int memorder) \ { \ - check_access(ptr, bits / BITS_PER_BYTE, KCSAN_ACCESS_ATOMIC); \ + if (!IS_ENABLED(CONFIG_KCSAN_IGNORE_ATOMICS)) { \ + check_access(ptr, bits / BITS_PER_BYTE, KCSAN_ACCESS_ATOMIC); \ + } \ return __atomic_load_n(ptr, memorder); \ } \ EXPORT_SYMBOL(__tsan_atomic##bits##_load); \ void __tsan_atomic##bits##_store(u##bits *ptr, u##bits v, int memorder); \ void __tsan_atomic##bits##_store(u##bits *ptr, u##bits v, int memorder) \ { \ - check_access(ptr, bits / BITS_PER_BYTE, KCSAN_ACCESS_WRITE | KCSAN_ACCESS_ATOMIC); \ + if (!IS_ENABLED(CONFIG_KCSAN_IGNORE_ATOMICS)) { \ + check_access(ptr, bits / BITS_PER_BYTE, \ + KCSAN_ACCESS_WRITE | KCSAN_ACCESS_ATOMIC); \ + } \ __atomic_store_n(ptr, v, memorder); \ } \ EXPORT_SYMBOL(__tsan_atomic##bits##_store) @@ -930,8 +935,11 @@ EXPORT_SYMBOL(__tsan_init); u##bits __tsan_atomic##bits##_##op(u##bits *ptr, u##bits v, int memorder); \ u##bits __tsan_atomic##bits##_##op(u##bits *ptr, u##bits v, int memorder) \ { \ - check_access(ptr, bits / BITS_PER_BYTE, \ - KCSAN_ACCESS_COMPOUND | KCSAN_ACCESS_WRITE | KCSAN_ACCESS_ATOMIC); \ + if (!IS_ENABLED(CONFIG_KCSAN_IGNORE_ATOMICS)) { \ + check_access(ptr, bits / BITS_PER_BYTE, \ + KCSAN_ACCESS_COMPOUND | KCSAN_ACCESS_WRITE | \ + KCSAN_ACCESS_ATOMIC); \ + } \ return __atomic_##op##suffix(ptr, v, memorder); \ } \ EXPORT_SYMBOL(__tsan_atomic##bits##_##op) @@ -959,8 +967,11 @@ EXPORT_SYMBOL(__tsan_init); int __tsan_atomic##bits##_compare_exchange_##strength(u##bits *ptr, u##bits *exp, \ u##bits val, int mo, int fail_mo) \ { \ - check_access(ptr, bits / BITS_PER_BYTE, \ - KCSAN_ACCESS_COMPOUND | KCSAN_ACCESS_WRITE | KCSAN_ACCESS_ATOMIC); \ + if (!IS_ENABLED(CONFIG_KCSAN_IGNORE_ATOMICS)) { \ + check_access(ptr, bits / BITS_PER_BYTE, \ + KCSAN_ACCESS_COMPOUND | KCSAN_ACCESS_WRITE | \ + KCSAN_ACCESS_ATOMIC); \ + } \ return __atomic_compare_exchange_n(ptr, exp, val, weak, mo, fail_mo); \ } \ EXPORT_SYMBOL(__tsan_atomic##bits##_compare_exchange_##strength) @@ -971,8 +982,11 @@ EXPORT_SYMBOL(__tsan_init); u##bits __tsan_atomic##bits##_compare_exchange_val(u##bits *ptr, u##bits exp, u##bits val, \ int mo, int fail_mo) \ { \ - check_access(ptr, bits / BITS_PER_BYTE, \ - KCSAN_ACCESS_COMPOUND | KCSAN_ACCESS_WRITE | KCSAN_ACCESS_ATOMIC); \ + if (!IS_ENABLED(CONFIG_KCSAN_IGNORE_ATOMICS)) { \ + check_access(ptr, bits / BITS_PER_BYTE, \ + KCSAN_ACCESS_COMPOUND | KCSAN_ACCESS_WRITE | \ + KCSAN_ACCESS_ATOMIC); \ + } \ __atomic_compare_exchange_n(ptr, &exp, val, 0, mo, fail_mo); \ return exp; \ } \ |