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Generic Ticket Spinlocks

From:  Palmer Dabbelt <palmer-AT-rivosinc.com>
To:  Arnd Bergmann <arnd-AT-arndb.de>
Subject:  [PATCH v5 0/7] Generic Ticket Spinlocks
Date:  Mon, 09 May 2022 15:29:49 -0700
Message-ID:  <20220509222956.2886-1-palmer@rivosinc.com>
Cc:  guoren-AT-kernel.org, peterz-AT-infradead.org, mingo-AT-redhat.com, Will Deacon <will-AT-kernel.org>, longman-AT-redhat.com, boqun.feng-AT-gmail.com, jonas-AT-southpole.se, stefan.kristiansson-AT-saunalahti.fi, shorne-AT-gmail.com, Paul Walmsley <paul.walmsley-AT-sifive.com>, Palmer Dabbelt <palmer-AT-dabbelt.com>, aou-AT-eecs.berkeley.edu, Arnd Bergmann <arnd-AT-arndb.de>, macro-AT-orcam.me.uk, Greg KH <gregkh-AT-linuxfoundation.org>, sudipm.mukherjee-AT-gmail.com, jszhang-AT-kernel.org, linux-csky-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, openrisc-AT-lists.librecores.org, linux-riscv-AT-lists.infradead.org, linux-arch-AT-vger.kernel.org, linux-riscv-AT-lists.infradead.org, linux-kernel-AT-vger.kernel.org
Archive-link:  Article

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@rivosinc.com>:
* Some wording cleanups for the qspinlock comment.
* Collected reviewed/tested tags.

Changes since v3 <20220414220214.24556-1-palmer@rivosinc.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@kernel.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@rivosinc.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.




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