Add missing CONFIG_KCSAN_IGNORE_ATOMICS checks for the builtin atomics instrumentation.
Signed-off-by: Marco Elver <el...@google.com>
---
v2:
* Add {} for readability.
Added to this series, as it would otherwise cause patch conflicts.
---
kernel/kcsan/core.c | 30 ++++++++++++++++++++++--------
1 file changed, 22 insertions(+), 8 deletions(-)
diff --git a/kernel/kcsan/core.c b/kernel/kcsan/core.c
index 4633baebf84e..e43a55643e00 100644
--- a/kernel/kcsan/core.c
+++ b/kernel/kcsan/core.c
@@ -892,14 +892,19 @@ 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)
@@ -908,8 +913,11 @@ 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)
@@ -937,8 +945,11 @@ 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)
@@ -949,8 +960,11 @@ 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;
\
}
\
--
2.28.0.rc0.142.g3c755180ce-goog
