char arch[PROP_VALUE_MAX];
if (__system_property_get("ro.arch", arch) > 0 &&
strncmp(arch, "exynos9810", sizeof("exynos9810") - 1) == 0) {
- // Some cores of Exynos 9810 are ARMv8.2 and others are ARMv8.0,
- // so disable the lse atomics completely.
+ // Some cores in the Exynos 9810 CPU are ARMv8.2 and others are ARMv8.0;
+ // only the former support LSE atomics. However, the kernel in the
+ // initial Android 8.0 release of Galaxy S9/S9+ devices incorrectly
+ // reported the feature as being supported.
+ //
+ // The kernel appears to have been corrected to mark it unsupported as of
+ // the Android 9.0 release on those devices, and this issue has not been
+ // observed anywhere else. Thus, this workaround may be removed if
+ // compiler-rt ever drops support for Android 8.0.
result = false;
}
}