Messages in this thread | | | Date | Mon, 9 Nov 2020 23:25:51 +0000 | From | Will Deacon <> | Subject | Re: [PATCH v4 0/4] Upgrade READ_ONCE() to RCpc acquire on arm64 with LTO |
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On Tue, Nov 03, 2020 at 12:17:17PM +0000, Will Deacon wrote: > Hi all, > > These patches were previously posted as part of a larger series enabling > architectures to override __READ_ONCE(): > > v3: https://lore.kernel.org/lkml/20200710165203.31284-1-will@kernel.org/ > > With the bulk of that merged, the four patches here override READ_ONCE() > so that it gains RCpc acquire semantics on arm64 when LTO is enabled. We > can revisit this as and when the compiler provides a means for us to reason > about the result of dependency-breaking optimisations. In the meantime, > this unblocks LTO for arm64, which I would really like to see merged so > that we can focus on enabling CFI. > > I plan to queue these on their own branch in the arm64 tree for 5.11 at > -rc3.
Now pushed to for-next/lto:
https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/lto
with Mark's comments addressed.
Will
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