linux-kernel - [PATCH v5 0/7] Generic Ticket Spinlocks

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Message-Id: <20220509222956.2886-1-palmer@rivosinc.com>
Date:   Mon,  9 May 2022 15:29:49 -0700
From:   Palmer Dabbelt <palmer@...osinc.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     guoren@...nel.org, peterz@...radead.org, mingo@...hat.com,
        Will Deacon <will@...nel.org>, longman@...hat.com,
        boqun.feng@...il.com, jonas@...thpole.se,
        stefan.kristiansson@...nalahti.fi, shorne@...il.com,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>, aou@...s.berkeley.edu,
        Arnd Bergmann <arnd@...db.de>, macro@...am.me.uk,
        Greg KH <gregkh@...uxfoundation.org>,
        sudipm.mukherjee@...il.com, jszhang@...nel.org,
        linux-csky@...r.kernel.org, linux-kernel@...r.kernel.org,
        openrisc@...ts.librecores.org, linux-riscv@...ts.infradead.org,
        linux-arch@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v5 0/7] Generic Ticket Spinlocks

The changes since v5 have been very minor, just some tags and a few
wording changes to the qspinlock comment.  There's also a PR for Arnd's
tree, assuming that lands I'll take the RISC-V bits into my tree and
assuming the csky and openrisc folks don't say anything I'll take those
too (though now that we're got a multi-tree merge going that doesn't
matter so much, but I said I'd take them so I'm going to default to
that as everyone else may have tuned out).

Changes since v4 <20220430153626.30660-1-palmer@...osinc.com>:
* Some wording cleanups for the qspinlock comment.
* Collected reviewed/tested tags.

Changes since v3 <20220414220214.24556-1-palmer@...osinc.com>:
* Added a smp_mb() in the lock slow-path, to make sure that is RCsc.
* Fixed the header guards.

Changes since v2 <20220319035457.2214979-1-guoren@...nel.org>:
* Picked up Peter's SOBs, which were posted on the v1.
* Re-ordered the first two patches, as they
* Re-worded the RISC-V qrwlock patch, as it was a bit mushy.  I also
  added a blurb in the qrwlock's top comment about this dependency.
* Picked up Stafford's fix for big-endian systems, which I have not
  tested as I don't have one (at least easily availiable, I think the BE
  MIPS systems are still in that pile in my garage).
* Call the generic version <asm-genenic/spinlock{_types}.h>, as there's
  really no utility to the version that only errors out.

Changes since v1 <20220316232600.20419-1-palmer@...osinc.com>:
* Follow Arnd suggestion to make the patch series more generic.
* Add csky in the series.
* Combine RISC-V's two patches into one.
* Modify openrisc's patch to suit the new generic version.