From: Palmer Dabbelt <palmer@sifive.com>
To: mark.rutland@arm.com
Cc: linux-kernel@vger.kernel.org, mark.rutland@arm.com,
boqun.feng@gmail.com, Will Deacon <will.deacon@arm.com>,
albert@sifive.com
Subject: Re: [PATCHv2 11/16] atomics/riscv: define atomic64_fetch_add_unless()
Date: Mon, 04 Jun 2018 16:17:21 -0700 (PDT) [thread overview]
Message-ID: <mhng-91e430d3-6e37-41ea-974a-520587871f4e@palmer-si-x1c4> (raw)
In-Reply-To: <20180529154346.3168-12-mark.rutland@arm.com>
On Tue, 29 May 2018 08:43:41 PDT (-0700), mark.rutland@arm.com wrote:
> 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 <mark.rutland@arm.com>
> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> Cc: Boqun Feng <boqun.feng@gmail.com>
> Cc: Will Deacon <will.deacon@arm.com>
> Cc: Palmer Dabbelt <palmer@sifive.com>
> Cc: Albert Ou <albert@sifive.com>
> ---
> 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
>
> /*
For some reason I remember there being a reason we were doing this in such an
odd fashion but I can't remember what it was any more. Assuming this still
builds, feel free to add an
Acked-by Palmer Dabbelt <palmer@sifive.com>
Thanks!
next prev parent reply other threads:[~2018-06-04 23:17 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-29 15:43 [PATCHv2 00/16] atomics: API cleanups Mark Rutland
2018-05-29 15:43 ` [PATCHv2 01/16] atomics/treewide: s/__atomic_add_unless/atomic_fetch_add_unless/ Mark Rutland
2018-06-04 23:24 ` Palmer Dabbelt
2018-05-29 15:43 ` [PATCHv2 02/16] atomics/treewide: remove redundant atomic_inc_not_zero() definitions Mark Rutland
2018-06-04 23:24 ` Palmer Dabbelt
2018-05-29 15:43 ` [PATCHv2 03/16] atomics/treewide: make atomic64_inc_not_zero() optional Mark Rutland
2018-06-04 23:17 ` Palmer Dabbelt
2018-06-05 5:34 ` Mark Rutland
2018-05-29 15:43 ` [PATCHv2 04/16] atomics/treewide: make atomic_fetch_add_unless() optional Mark Rutland
2018-06-04 23:24 ` Palmer Dabbelt
2018-05-29 15:43 ` [PATCHv2 05/16] atomics: prepare for atomic64_fetch_add_unless() Mark Rutland
2018-06-05 9:26 ` Peter Zijlstra
2018-06-05 9:53 ` Mark Rutland
2018-06-05 10:54 ` Michael Ellerman
2018-06-05 11:08 ` Mark Rutland
2018-06-06 8:57 ` Michael Ellerman
2018-05-29 15:43 ` [PATCHv2 06/16] atomics/generic: define atomic64_fetch_add_unless() Mark Rutland
2018-05-29 15:43 ` [PATCHv2 07/16] atomics/alpha: " Mark Rutland
2018-05-29 15:43 ` [PATCHv2 08/16] atomics/arc: " Mark Rutland
2018-05-29 15:43 ` [PATCHv2 09/16] atomics/arm: " Mark Rutland
2018-05-29 15:43 ` [PATCHv2 10/16] atomics/powerpc: " Mark Rutland
2018-05-29 15:43 ` [PATCHv2 11/16] atomics/riscv: " Mark Rutland
2018-06-04 23:17 ` Palmer Dabbelt [this message]
2018-05-29 15:43 ` [PATCHv2 12/16] atomics/treewide: make atomic64_fetch_add_unless() optional Mark Rutland
2018-05-29 15:43 ` [PATCHv2 13/16] atomics/treewide: make test ops optional Mark Rutland
2018-06-04 23:17 ` Palmer Dabbelt
2018-05-29 15:43 ` [PATCHv2 14/16] atomics/treewide: remove atomic_inc_not_zero_hint() Mark Rutland
2018-05-29 15:43 ` [PATCHv2 15/16] atomics/treewide: make unconditional inc/dec ops optional Mark Rutland
2018-06-04 23:17 ` Palmer Dabbelt
2018-05-29 15:43 ` [PATCHv2 16/16] atomics/treewide: make conditional " Mark Rutland
2018-05-30 11:23 ` [PATCHv2 00/16] atomics: API cleanups Mark Rutland
2018-05-30 13:34 ` Mark Rutland
2018-06-05 9:43 ` Peter Zijlstra
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