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Subject[PATCHv2 11/16] atomics/riscv: define atomic64_fetch_add_unless()
As a step towards unifying the atomic/atomic64/atomic_long APIs, this
patch converts the arch/riscv implementation of atomic64_add_unless()
into an implementation of atomic64_fetch_add_unless().

A wrapper in <linux/atomic.h> will build atomic_add_unless() atop of
this, provided it is given a preprocessor definition.

No functional change is intended as a result of this patch.

Signed-off-by: Mark Rutland <>
Acked-by: Peter Zijlstra (Intel) <>
Cc: Boqun Feng <>
Cc: Will Deacon <>
Cc: Palmer Dabbelt <>
Cc: Albert Ou <>
arch/riscv/include/asm/atomic.h | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/arch/riscv/include/asm/atomic.h b/arch/riscv/include/asm/atomic.h
index 5f161daefcd2..d959bbaaad41 100644
--- a/arch/riscv/include/asm/atomic.h
+++ b/arch/riscv/include/asm/atomic.h
@@ -352,7 +352,7 @@ static __always_inline int atomic_fetch_add_unless(atomic_t *v, int a, int u)
#define atomic_fetch_add_unless atomic_fetch_add_unless

-static __always_inline long __atomic64_add_unless(atomic64_t *v, long a, long u)
+static __always_inline long atomic64_fetch_add_unless(atomic64_t *v, long a, long u)
long prev, rc;

@@ -369,11 +369,7 @@ static __always_inline long __atomic64_add_unless(atomic64_t *v, long a, long u)
: "memory");
return prev;
-static __always_inline int atomic64_add_unless(atomic64_t *v, long a, long u)
- return __atomic64_add_unless(v, a, u) != u;
+#define atomic64_fetch_add_unless atomic64_fetch_add_unless

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