From: Uros Bizjak <ubizjak@gmail.com> To: linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-arch@vger.kernel.org, linux-perf-users@vger.kernel.org Cc: Uros Bizjak <ubizjak@gmail.com>, Michael Ellerman <mpe@ellerman.id.au>, Nicholas Piggin <npiggin@gmail.com>, Christophe Leroy <christophe.leroy@csgroup.eu> Subject: [PATCH 06/10] locking/powerpc: Wire up local_try_cmpxchg Date: Sun, 5 Mar 2023 21:56:24 +0100 [thread overview] Message-ID: <20230305205628.27385-7-ubizjak@gmail.com> (raw) In-Reply-To: <20230305205628.27385-1-ubizjak@gmail.com> Implement target specific support for local_try_cmpxchg. Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Signed-off-by: Uros Bizjak <ubizjak@gmail.com> Signed-off-by: Uros Bizjak <ubizjak@gmail.com> --- arch/powerpc/include/asm/local.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/powerpc/include/asm/local.h b/arch/powerpc/include/asm/local.h index bc4bd19b7fc2..45492fb5bf22 100644 --- a/arch/powerpc/include/asm/local.h +++ b/arch/powerpc/include/asm/local.h @@ -90,6 +90,17 @@ static __inline__ long local_cmpxchg(local_t *l, long o, long n) return t; } +static __inline__ bool local_try_cmpxchg(local_t *l, long *po, long n) +{ + long o = *po, r; + + r = local_cmpxchg(l, o, n); + if (unlikely(r != o)) + *po = r; + + return likely(r == o); +} + static __inline__ long local_xchg(local_t *l, long n) { long t; -- 2.39.2
WARNING: multiple messages have this Message-ID (diff)
From: Uros Bizjak <ubizjak@gmail.com> To: linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-arch@vger.kernel.org, linux-perf-users@vger.kernel.org Cc: Uros Bizjak <ubizjak@gmail.com>, Nicholas Piggin <npiggin@gmail.com> Subject: [PATCH 06/10] locking/powerpc: Wire up local_try_cmpxchg Date: Sun, 5 Mar 2023 21:56:24 +0100 [thread overview] Message-ID: <20230305205628.27385-7-ubizjak@gmail.com> (raw) In-Reply-To: <20230305205628.27385-1-ubizjak@gmail.com> Implement target specific support for local_try_cmpxchg. Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Signed-off-by: Uros Bizjak <ubizjak@gmail.com> Signed-off-by: Uros Bizjak <ubizjak@gmail.com> --- arch/powerpc/include/asm/local.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/powerpc/include/asm/local.h b/arch/powerpc/include/asm/local.h index bc4bd19b7fc2..45492fb5bf22 100644 --- a/arch/powerpc/include/asm/local.h +++ b/arch/powerpc/include/asm/local.h @@ -90,6 +90,17 @@ static __inline__ long local_cmpxchg(local_t *l, long o, long n) return t; } +static __inline__ bool local_try_cmpxchg(local_t *l, long *po, long n) +{ + long o = *po, r; + + r = local_cmpxchg(l, o, n); + if (unlikely(r != o)) + *po = r; + + return likely(r == o); +} + static __inline__ long local_xchg(local_t *l, long n) { long t; -- 2.39.2
next prev parent reply other threads:[~2023-03-05 20:57 UTC|newest] Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-03-05 20:56 [PATCH 00/10] locking: Introduce local{,64}_try_cmpxchg Uros Bizjak 2023-03-05 20:56 ` Uros Bizjak 2023-03-05 20:56 ` Uros Bizjak 2023-03-05 20:56 ` [PATCH 01/10] locking/atomic: Add missing cast to try_cmpxchg() fallbacks Uros Bizjak 2023-03-05 20:56 ` Uros Bizjak 2023-03-24 14:13 ` Mark Rutland 2023-03-24 14:13 ` Mark Rutland 2023-03-24 15:43 ` Uros Bizjak 2023-03-24 15:43 ` Uros Bizjak 2023-03-24 15:43 ` Uros Bizjak 2023-03-24 16:14 ` Mark Rutland 2023-03-24 16:14 ` Mark Rutland 2023-03-24 16:14 ` Mark Rutland 2023-03-24 16:32 ` Mark Rutland 2023-03-24 16:32 ` Mark Rutland 2023-03-24 16:32 ` Mark Rutland 2023-03-26 19:28 ` Uros Bizjak 2023-03-26 19:28 ` Uros Bizjak 2023-04-03 10:19 ` Mark Rutland 2023-04-03 10:19 ` Mark Rutland 2023-04-04 12:24 ` Uros Bizjak 2023-04-04 12:24 ` Uros Bizjak 2023-04-04 13:19 ` Mark Rutland 2023-04-04 13:19 ` Mark Rutland 2023-04-04 13:23 ` Uros Bizjak 2023-04-04 13:23 ` Uros Bizjak 2023-03-05 20:56 ` [PATCH 02/10] locking/atomic: Add generic try_cmpxchg{,64}_local support Uros Bizjak 2023-03-05 20:56 ` Uros Bizjak 2023-03-05 20:56 ` [PATCH 03/10] locking/alpha: Wire up local_try_cmpxchg Uros Bizjak 2023-03-05 20:56 ` Uros Bizjak 2023-03-05 20:56 ` [PATCH 04/10] locking/loongarch: " Uros Bizjak 2023-03-05 20:56 ` Uros Bizjak 2023-03-05 20:56 ` [PATCH 05/10] locking/mips: " Uros Bizjak 2023-03-05 20:56 ` Uros Bizjak 2023-03-05 20:56 ` Uros Bizjak [this message] 2023-03-05 20:56 ` [PATCH 06/10] locking/powerpc: " Uros Bizjak 2023-03-05 20:56 ` [PATCH 07/10] locking/x86: " Uros Bizjak 2023-03-05 20:56 ` Uros Bizjak 2023-03-05 20:56 ` [PATCH 08/10] locking/generic: Wire up local{,64}_try_cmpxchg Uros Bizjak 2023-03-05 20:56 ` [PATCH 09/10] locking/x86: Enable local{,64}_try_cmpxchg Uros Bizjak 2023-03-05 20:56 ` Uros Bizjak 2023-03-05 20:56 ` [PATCH 10/10] perf/ring_buffer: use local_try_cmpxchg in __perf_output_begin Uros Bizjak 2023-03-05 20:56 ` Uros Bizjak
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