forked from luck/tmp_suning_uos_patched
0f8ad5f2e9
Some architectures (currently e.g. s390 partially) implement atomics using the compiler's atomic builtins (__atomic_*, __sync_*). To support enabling KCSAN on such architectures in future, or support experimental use of these builtins, implement support for them. We should also avoid breaking KCSAN kernels due to use (accidental or otherwise) of atomic builtins in drivers, as has happened in the past: https://lkml.kernel.org/r/5231d2c0-41d9-6721-e15f-a7eedf3ce69e@infradead.org The instrumentation is subtly different from regular reads/writes: TSAN instrumentation replaces the use of atomic builtins with a call into the runtime, and the runtime's job is to also execute the desired atomic operation. We rely on the __atomic_* compiler builtins, available with all KCSAN-supported compilers, to implement each TSAN atomic instrumentation function. Signed-off-by: Marco Elver <elver@google.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
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| .. | ||
| atomic.h | ||
| core.c | ||
| debugfs.c | ||
| encoding.h | ||
| kcsan-test.c | ||
| kcsan.h | ||
| Makefile | ||
| report.c | ||
| selftest.c | ||