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: Dave Hansen <dave.hansen@linux.intel.com>,
Uros Bizjak <ubizjak@gmail.com>, Ingo Molnar <mingo@redhat.com>,
Borislav Petkov <bp@alien8.de>, "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: [PATCH 09/10] locking/x86: Enable local{,64}_try_cmpxchg
Date: Sun, 5 Mar 2023 21:56:27 +0100 [thread overview]
Message-ID: <20230305205628.27385-10-ubizjak@gmail.com> (raw)
In-Reply-To: <20230305205628.27385-1-ubizjak@gmail.com>
Enable local_try_cmpxchg and also local64_try_cmpxchg for x86_64.
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
---
arch/x86/include/asm/cmpxchg.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/x86/include/asm/cmpxchg.h b/arch/x86/include/asm/cmpxchg.h
index 94fbe6ae7431..e8f939e8432e 100644
--- a/arch/x86/include/asm/cmpxchg.h
+++ b/arch/x86/include/asm/cmpxchg.h
@@ -221,9 +221,15 @@ extern void __add_wrong_size(void)
#define __try_cmpxchg(ptr, pold, new, size) \
__raw_try_cmpxchg((ptr), (pold), (new), (size), LOCK_PREFIX)
+#define __try_cmpxchg_local(ptr, pold, new, size) \
+ __raw_try_cmpxchg((ptr), (pold), (new), (size), "")
+
#define arch_try_cmpxchg(ptr, pold, new) \
__try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr)))
+#define arch_try_cmpxchg_local(ptr, pold, new) \
+ __try_cmpxchg_local((ptr), (pold), (new), sizeof(*(ptr)))
+
/*
* xadd() adds "inc" to "*ptr" and atomically returns the previous
* value of "*ptr".
--
2.39.2
next prev parent reply other threads:[~2023-03-05 21:05 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 ` [PATCH 06/10] locking/powerpc: " Uros Bizjak
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 ` Uros Bizjak [this message]
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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