From: Heiko Carstens <hca@linux.ibm.com>
To: Lyude Paul <lyude@redhat.com>
Cc: rust-for-linux@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Boqun Feng <boqun.feng@gmail.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Vasily Gorbik <gor@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Sven Schnelle <svens@linux.ibm.com>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
<x86@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
Arnd Bergmann <arnd@arndb.de>,
Juergen Christ <jchrist@linux.ibm.com>,
Ilya Leoshkevich <iii@linux.ibm.com>,
"moderated list:ARM64 PORT (AARCH64 ARCHITECTURE)"
<linux-arm-kernel@lists.infradead.org>,
open list <linux-kernel@vger.kernel.org>,
"open list:S390 ARCHITECTURE" <linux-s390@vger.kernel.org>,
"open list:GENERIC INCLUDE/ASM HEADER FILES"
<linux-arch@vger.kernel.org>
Subject: Re: [PATCH v9 2/9] preempt: Introduce __preempt_count_{sub, add}_return()
Date: Mon, 5 May 2025 11:56:29 +0200 [thread overview]
Message-ID: <20250505095629.13658Aea-hca@linux.ibm.com> (raw)
In-Reply-To: <1491bedb15db7317d2af77345b2946c2529c70b1.camel@redhat.com>
On Wed, Apr 30, 2025 at 05:38:02PM -0400, Lyude Paul wrote:
> On Fri, 2025-02-28 at 10:15 +0100, Heiko Carstens wrote:
> >
> > Well.. at least it should not, but the way it is currently implemented it
> > indeed does sometimes depending on config options - there is room for
> > improvement. That's my fault - going to address that.
>
> BTW - was this ever fixed? Going through and applying changes to the spinlock
> series to get it ready for sending out again and I don't know if I should
> leave this code as-is or not here.
Well, this fix was that the atomic primitives, like used in your code, would
always fail to compile. That was address with commit 08d95a12cd28
("s390/atomic_ops: Let __atomic_add_const() variants always return void").
So yes, you need to change your code like I proposed.
next prev parent reply other threads:[~2025-05-05 9:57 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-27 22:10 [PATCH v9 0/9] Refcounted interrupts, SpinLockIrq for rust Lyude Paul
2025-02-27 22:10 ` [PATCH v9 1/9] preempt: Introduce HARDIRQ_DISABLE_BITS Lyude Paul
2025-02-27 23:09 ` Steven Rostedt
2025-02-28 1:33 ` Boqun Feng
2025-03-03 21:55 ` Lyude Paul
2025-02-28 7:57 ` Peter Zijlstra
2025-02-27 22:10 ` [PATCH v9 2/9] preempt: Introduce __preempt_count_{sub, add}_return() Lyude Paul
2025-02-28 1:49 ` Boqun Feng
2025-02-28 9:15 ` Heiko Carstens
2025-02-28 9:24 ` Peter Zijlstra
2025-04-30 21:38 ` Lyude Paul
2025-05-05 9:56 ` Heiko Carstens [this message]
2025-03-01 18:49 ` kernel test robot
2025-03-01 19:00 ` kernel test robot
2025-02-27 22:10 ` [PATCH v9 3/9] irq & spin_lock: Add counted interrupt disabling/enabling Lyude Paul
2025-03-01 20:19 ` kernel test robot
2025-02-27 22:10 ` [PATCH v9 4/9] rust: Introduce interrupt module Lyude Paul
2025-03-02 16:56 ` Dirk Behme
2025-02-27 22:10 ` [PATCH v9 5/9] rust: helper: Add spin_{un,}lock_irq_{enable,disable}() helpers Lyude Paul
2025-02-27 22:10 ` [PATCH v9 6/9] rust: sync: Add SpinLockIrq Lyude Paul
2025-03-02 11:51 ` Guangbo Cui
2025-03-03 22:15 ` Lyude Paul
2025-03-02 17:07 ` Dirk Behme
2025-04-04 21:56 ` Lyude Paul
2025-02-27 22:10 ` [PATCH v9 7/9] rust: sync: Introduce lock::Backend::Context Lyude Paul
2025-03-03 14:22 ` Dirk Behme
2025-02-27 22:10 ` [PATCH v9 8/9] rust: sync: lock: Add `Backend::BackendInContext` Lyude Paul
2025-03-03 14:23 ` Dirk Behme
2025-02-27 22:10 ` [PATCH v9 9/9] locking: Switch to _irq_{disable,enable}() variants in cleanup guards Lyude Paul
2025-04-05 8:25 ` Guangbo Cui
2025-04-05 8:55 ` Guangbo Cui
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