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
next prev parent reply other threads:[~2023-03-05 20:57 UTC|newest]
Thread overview: 20+ 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 ` [PATCH 01/10] locking/atomic: Add missing cast to try_cmpxchg() fallbacks Uros Bizjak
2023-03-24 14:13 ` Mark Rutland
2023-03-24 15:43 ` Uros Bizjak
2023-03-24 16:14 ` Mark Rutland
2023-03-24 16:32 ` Mark Rutland
2023-03-26 19:28 ` Uros Bizjak
2023-04-03 10:19 ` Mark Rutland
2023-04-04 12:24 ` Uros Bizjak
2023-04-04 13:19 ` Mark Rutland
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 ` [PATCH 03/10] locking/alpha: Wire up local_try_cmpxchg Uros Bizjak
2023-03-05 20:56 ` [PATCH 04/10] locking/loongarch: " Uros Bizjak
2023-03-05 20:56 ` [PATCH 05/10] locking/mips: " Uros Bizjak
2023-03-05 20:56 ` Uros Bizjak [this message]
2023-03-05 20:56 ` [PATCH 07/10] locking/x86: " 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 ` [PATCH 10/10] perf/ring_buffer: use local_try_cmpxchg in __perf_output_begin Uros Bizjak
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