[PATCH] frv: cmpxchg: Implement cmpxchg64

From: Will Deacon
Date: Mon Jul 03 2017 - 08:24:39 EST

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

Cc: Joerg Roedel <joro@xxxxxxxxxx>
Cc: Robin Murphy <robin.murphy@xxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Reported-by: kbuild test robot <fengguang.wu@xxxxxxxxx>
Signed-off-by: Will Deacon <will.deacon@xxxxxxx>

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

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

diff --git a/arch/frv/include/asm/cmpxchg.h b/arch/frv/include/asm/cmpxchg.h
index a899765102ea..ad1f11cfa92a 100644
--- a/arch/frv/include/asm/cmpxchg.h
+++ b/arch/frv/include/asm/cmpxchg.h
@@ -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))