On Tue, 29 May 2018 08:43:33 PDT (-0700), mark.rutl...@arm.com wrote:
We define a trivial fallback for atomic_inc_not_zero(), but don't do
the same for atmic64_inc_not_zero(), leading most architectures to
define the same boilerplate.
atmic64
Let's add a fallback in <linux/atomic.h>, and remove the redundant
implementations. Note that atomic64_add_unless() is always defined in
<linux/atomic.h>, and promotes its arguments to the requisite types, so
we need not do this explicitly.
There should be no functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutl...@arm.com>
Acked-by: Peter Zijlstra (Intel) <pet...@infradead.org>
Cc: Boqun Feng <boqun.f...@gmail.com>
Cc: Will Deacon <will.dea...@arm.com>
---
arch/alpha/include/asm/atomic.h | 2 --
arch/arc/include/asm/atomic.h | 1 -
arch/arm/include/asm/atomic.h | 1 -
arch/arm64/include/asm/atomic.h | 2 --
arch/ia64/include/asm/atomic.h | 2 --
arch/mips/include/asm/atomic.h | 2 --
arch/parisc/include/asm/atomic.h | 2 --
arch/powerpc/include/asm/atomic.h | 1 +
arch/riscv/include/asm/atomic.h | 7 -------
arch/s390/include/asm/atomic.h | 1 -
arch/sparc/include/asm/atomic_64.h | 2 --
arch/x86/include/asm/atomic64_32.h | 2 +-
arch/x86/include/asm/atomic64_64.h | 2 --
include/asm-generic/atomic-instrumented.h | 3 +++
include/asm-generic/atomic64.h | 1 -
include/linux/atomic.h | 11 +++++++++++
16 files changed, 16 insertions(+), 26 deletions(-)
[...]
diff --git a/arch/riscv/include/asm/atomic.h b/arch/riscv/include/asm/atomic.h
index 0e27e050ba14..18259e90f57e 100644
--- a/arch/riscv/include/asm/atomic.h
+++ b/arch/riscv/include/asm/atomic.h
@@ -375,13 +375,6 @@ static __always_inline int atomic64_add_unless(atomic64_t
*v, long a, long u)
}
#endif
-#ifndef CONFIG_GENERIC_ATOMIC64
-static __always_inline long atomic64_inc_not_zero(atomic64_t *v)
-{
- return atomic64_add_unless(v, 1, 0);
-}
-#endif
-
/*
* atomic_{cmp,}xchg is required to have exactly the same ordering semantics as
* {cmp,}xchg and the operations that return, so they need a full barrier.
Acked-by: Palmer Dabbelt <pal...@sifive.com>
Thanks!
