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-rw-r--r--arch/sparc/Kconfig7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index bd992c0048f..fbcc00c6c06 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -178,6 +178,13 @@ config ARCH_HAS_ILOG2_U64
bool
default n
+config EMULATED_CMPXCHG
+ bool
+ default y
+ help
+ Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
+ is emulated, and therefore it is not completely atomic.
+
config SUN_PM
bool
default y