[RFC][PATCH 00/12] Introduce cmpxchg128() -- aka. the demise of cmpxchg_double()

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To: torvalds@xxxxxxxxxxxxxxxxxxxx
Subject: [RFC][PATCH 00/12] Introduce cmpxchg128() -- aka. the demise of cmpxchg_double()
From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Date: Mon, 19 Dec 2022 16:35:25 +0100
Cc: corbet@xxxxxxx, will@xxxxxxxxxx, peterz@xxxxxxxxxxxxx, boqun.feng@xxxxxxxxx, mark.rutland@xxxxxxx, catalin.marinas@xxxxxxx, dennis@xxxxxxxxxx, tj@xxxxxxxxxx, cl@xxxxxxxxx, hca@xxxxxxxxxxxxx, gor@xxxxxxxxxxxxx, agordeev@xxxxxxxxxxxxx, borntraeger@xxxxxxxxxxxxx, svens@xxxxxxxxxxxxx, Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>, davem@xxxxxxxxxxxxx, tglx@xxxxxxxxxxxxx, mingo@xxxxxxxxxx, bp@xxxxxxxxx, dave.hansen@xxxxxxxxxxxxxxx, x86@xxxxxxxxxx, hpa@xxxxxxxxx, joro@xxxxxxxxxx, suravee.suthikulpanit@xxxxxxx, robin.murphy@xxxxxxx, dwmw2@xxxxxxxxxxxxx, baolu.lu@xxxxxxxxxxxxxxx, Arnd Bergmann <arnd@xxxxxxxx>, penberg@xxxxxxxxxx, rientjes@xxxxxxxxxx, iamjoonsoo.kim@xxxxxxx, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, vbabka@xxxxxxx, roman.gushchin@xxxxxxxxx, 42.hyeyoo@xxxxxxxxx, linux-doc@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, linux-crypto@xxxxxxxxxxxxxxx, iommu@xxxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx
User-agent: quilt/0.66

Hi,

Since Linus hated on cmpxchg_double(), a few patches to get rid of it, as proposed here:

  https://lkml.kernel.org/r/Y2U3WdU61FvYlpUh@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

based on tip/master because Linus' tree is moving a wee bit fast at the moment.

0day robot is all green for building, very limited testing on arm64/s390
for obvious raisins -- I tried to get the asm right, but please, double
check.

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Follow-Ups:
- Re: [RFC][PATCH 00/12] Introduce cmpxchg128() -- aka. the demise of cmpxchg_double()
  - From: Boqun Feng
- [RFC][PATCH 12/12] arch: Remove cmpxchg_double
  - From: Peter Zijlstra
- [RFC][PATCH 11/12] slub: Replace cmpxchg_double()
  - From: Peter Zijlstra
- [RFC][PATCH 07/12] percpu: Wire up cmpxchg128
  - From: Peter Zijlstra
- [RFC][PATCH 05/12] arch: Introduce arch_{,try_}_cmpxchg128{,_local}()
  - From: Peter Zijlstra
- [RFC][PATCH 01/12] crypto: Remove u128 usage
  - From: Peter Zijlstra
- [RFC][PATCH 03/12] cyrpto/b128ops: Remove struct u128
  - From: Peter Zijlstra
- [RFC][PATCH 08/12] s390: Replace cmpxchg_double() with cmpxchg128()
  - From: Peter Zijlstra
- [RFC][PATCH 10/12] x86,intel_iommu: Replace cmpxchg_double()
  - From: Peter Zijlstra
- [RFC][PATCH 06/12] instrumentation: Wire up cmpxchg128()
  - From: Peter Zijlstra
- [RFC][PATCH 09/12] x86,amd_iommu: Replace cmpxchg_double()
  - From: Peter Zijlstra
- [RFC][PATCH 02/12] crypto/ghash-clmulni: Use (struct) be128
  - From: Peter Zijlstra
- [RFC][PATCH 04/12] types: Introduce [us]128
  - From: Peter Zijlstra

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