Commit-ID: 2b523f170e399b0e1c8eec2c4b5889735b0d2b9b
Gitweb: https://git.kernel.org/tip/2b523f170e399b0e1c8eec2c4b5889735b0d2b9b
Author: Mark Rutland <mark.rutland@xxxxxxx>
AuthorDate: Thu, 21 Jun 2018 13:13:16 +0100
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Thu, 21 Jun 2018 14:25:24 +0200
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.
Acked-by Palmer Dabbelt <palmer@xxxxxxxxxx>
Signed-off-by: Mark Rutland <mark.rutland@xxxxxxx>
Reviewed-by: Will Deacon <will.deacon@xxxxxxx>
Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Albert Ou <albert@xxxxxxxxxx>
Cc: Boqun Feng <boqun.feng@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Palmer Dabbelt <palmer@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/lkml/20180621121321.4761-14-mark.rutland@xxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
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
#ifndef CONFIG_GENERIC_ATOMIC64
-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
#endif
/*
--
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