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Merge branch 'kcsan' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into locking/core

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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>
This commit is contained in:
Ingo Molnar
2020-10-09 08:35:01 +02:00
parent e705d39796 cd290ec246
commit d6c4c11348
16 changed files with 677 additions and 347 deletions
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55
tools/objtool/check.c
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@@ -528,6 +528,61 @@ static const char *uaccess_safe_builtin[] = {
"__tsan_write4",
"__tsan_write8",
"__tsan_write16",
"__tsan_read_write1",
"__tsan_read_write2",
"__tsan_read_write4",
"__tsan_read_write8",
"__tsan_read_write16",
"__tsan_atomic8_load",
"__tsan_atomic16_load",
"__tsan_atomic32_load",
"__tsan_atomic64_load",
"__tsan_atomic8_store",
"__tsan_atomic16_store",
"__tsan_atomic32_store",
"__tsan_atomic64_store",
"__tsan_atomic8_exchange",
"__tsan_atomic16_exchange",
"__tsan_atomic32_exchange",
"__tsan_atomic64_exchange",
"__tsan_atomic8_fetch_add",
"__tsan_atomic16_fetch_add",
"__tsan_atomic32_fetch_add",
"__tsan_atomic64_fetch_add",
"__tsan_atomic8_fetch_sub",
"__tsan_atomic16_fetch_sub",
"__tsan_atomic32_fetch_sub",
"__tsan_atomic64_fetch_sub",
"__tsan_atomic8_fetch_and",
"__tsan_atomic16_fetch_and",
"__tsan_atomic32_fetch_and",
"__tsan_atomic64_fetch_and",
"__tsan_atomic8_fetch_or",
"__tsan_atomic16_fetch_or",
"__tsan_atomic32_fetch_or",
"__tsan_atomic64_fetch_or",
"__tsan_atomic8_fetch_xor",
"__tsan_atomic16_fetch_xor",
"__tsan_atomic32_fetch_xor",
"__tsan_atomic64_fetch_xor",
"__tsan_atomic8_fetch_nand",
"__tsan_atomic16_fetch_nand",
"__tsan_atomic32_fetch_nand",
"__tsan_atomic64_fetch_nand",
"__tsan_atomic8_compare_exchange_strong",
"__tsan_atomic16_compare_exchange_strong",
"__tsan_atomic32_compare_exchange_strong",
"__tsan_atomic64_compare_exchange_strong",
"__tsan_atomic8_compare_exchange_weak",
"__tsan_atomic16_compare_exchange_weak",
"__tsan_atomic32_compare_exchange_weak",
"__tsan_atomic64_compare_exchange_weak",
"__tsan_atomic8_compare_exchange_val",
"__tsan_atomic16_compare_exchange_val",
"__tsan_atomic32_compare_exchange_val",
"__tsan_atomic64_compare_exchange_val",
"__tsan_atomic_thread_fence",
"__tsan_atomic_signal_fence",
/* KCOV */
"write_comp_data",
"check_kcov_mode",