Fix the CAS spinlock implementation

[project/bcm63xx/atf.git] / make_helpers / defaults.mk

diff --git a/make_helpers/defaults.mk b/make_helpers/defaults.mk
index b6f76559cb7dcd30c199b70c2a51507e48506707..b7fb173b16c402c356d805915d1c078d20717e31 100644 (file)
--- a/make_helpers/defaults.mk
+++ b/make_helpers/defaults.mk
@@ -234,3 +234,8 @@ else
 endif
 
 SANITIZE_UB := off
+
+# For ARMv8.1 (AArch64) platforms, enabling this option selects the spinlock
+# implementation variant using the ARMv8.1-LSE compare-and-swap instruction.
+# Default: disabled
+USE_SPINLOCK_CAS := 0