[PATCHv3 02/18] atomics/treewide: remove redundant atomic_inc_not_zero() definitions

From: Mark Rutland
Date: Mon Jun 18 2018 - 06:23:55 EST


When atomic_inc_not_zero(v) isn't defined, <linux/atomic.h> will define
it as falling back to atomic_add_unless((v), 1, 0), so there's no need
for arch code to do so.

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@xxxxxxx>
Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Acked-by: Palmer Dabbelt <palmer@xxxxxxxxxx>
Cc: Boqun Feng <boqun.feng@xxxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
---
arch/arc/include/asm/atomic.h | 2 --
arch/hexagon/include/asm/atomic.h | 2 --
arch/riscv/include/asm/atomic.h | 9 ---------
3 files changed, 13 deletions(-)

diff --git a/arch/arc/include/asm/atomic.h b/arch/arc/include/asm/atomic.h
index 67121b5ff3a3..cecdf3403caf 100644
--- a/arch/arc/include/asm/atomic.h
+++ b/arch/arc/include/asm/atomic.h
@@ -336,8 +336,6 @@ ATOMIC_OPS(xor, ^=, CTOP_INST_AXOR_DI_R2_R2_R3)
c; \
})

-#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
-
#define atomic_inc(v) atomic_add(1, v)
#define atomic_dec(v) atomic_sub(1, v)

diff --git a/arch/hexagon/include/asm/atomic.h b/arch/hexagon/include/asm/atomic.h
index 287aa9f394f3..d2feeba93c44 100644
--- a/arch/hexagon/include/asm/atomic.h
+++ b/arch/hexagon/include/asm/atomic.h
@@ -197,8 +197,6 @@ static inline int atomic_fetch_add_unless(atomic_t *v, int a, int u)
return __oldval;
}

-#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
-
#define atomic_inc(v) atomic_add(1, (v))
#define atomic_dec(v) atomic_sub(1, (v))

diff --git a/arch/riscv/include/asm/atomic.h b/arch/riscv/include/asm/atomic.h
index 739e810c857e..0e27e050ba14 100644
--- a/arch/riscv/include/asm/atomic.h
+++ b/arch/riscv/include/asm/atomic.h
@@ -375,15 +375,6 @@ static __always_inline int atomic64_add_unless(atomic64_t *v, long a, long u)
}
#endif

-/*
- * The extra atomic operations that are constructed from one of the core
- * LR/SC-based operations above.
- */
-static __always_inline int atomic_inc_not_zero(atomic_t *v)
-{
- return atomic_fetch_add_unless(v, 1, 0);
-}
-
#ifndef CONFIG_GENERIC_ATOMIC64
static __always_inline long atomic64_inc_not_zero(atomic64_t *v)
{
--
2.11.0