powerpc: Use generic atomic64_t implementation on 32-bit processors

This makes 32-bit powerpc use the generic atomic64_t implementation.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

2 files changed, 4 insertions, 0 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index eae0c2bbbf38..9fb344d5a86a 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -125,6 +125,7 @@ config PPC
         select USE_GENERIC_SMP_HELPERS if SMP
         select HAVE_OPROFILE
         select HAVE_SYSCALL_WRAPPERS if PPC64
+        select GENERIC_ATOMIC64 if PPC32
 
 config EARLY_PRINTK
         bool
diff --git a/arch/powerpc/include/asm/atomic.h b/arch/powerpc/include/asm/atomic.h
index b7d2d07b6f96..4012483b1899 100644
--- a/arch/powerpc/include/asm/atomic.h
+++ b/arch/powerpc/include/asm/atomic.h
@@ -470,6 +470,9 @@ static __inline__ int atomic64_add_unless(atomic64_t *v, long a, long u)
 
 #define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0)
 
+#else  /* __powerpc64__ */
+#include <asm-generic/atomic64.h>
+
 #endif /* __powerpc64__ */
 
 #include <asm-generic/atomic-long.h>