frv: cmpxchg: Implement cmpxchg64

FRV supports 64-bit cmpxchg, which is provided by the arch code as __cmpxchg_64 and subsequently used to implement atomic64_cmpxchg.

This patch hooks up the generic cmpxchg64 API using the same function, which also provides default definitions of the relaxed, acquire and release variants. This fixes the build when COMPILE_TEST=y and IOMMU_IO_PGTABLE_LPAE=y.

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FRV is orphaned, so not sure where to send this.

 arch/frv/include/asm/cmpxchg.h | 1 +
 1 file changed, 1 insertion(+)

index a899765102ea..ad1f11cfa92a 100644
@@ -76,6 +76,7 @@ extern uint32_t __xchg_32(uint32_t i, volatile void *v);
  * - if (*ptr != test) then orig = *ptr;
  */
 extern uint64_t __cmpxchg_64(uint64_t test, uint64_t new, volatile uint64_t *v);
+#define cmpxchg64(p, o, n)	__cmpxchg_64((o), (n), (p))
 
 #ifndef CONFIG_FRV_OUTOFLINE_ATOMIC_OPS
 

2.1.4