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Message-ID: <ZAbGSA6F0kfv9YYw@sunil-laptop>
Date:   Tue, 7 Mar 2023 10:36:16 +0530
From:   Sunil V L <sunilvl@...tanamicro.com>
To:     Conor Dooley <conor@...nel.org>
Cc:     linux-riscv@...ts.infradead.org, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Jonathan Corbet <corbet@....net>,
        Anup Patel <apatel@...tanamicro.com>,
        Andrew Jones <ajones@...tanamicro.com>,
        Atish Patra <atishp@...osinc.com>,
        'Conor Dooley ' <conor.dooley@...rochip.com>,
        llvm@...ts.linux.dev
Subject: Re: [PATCH V3 00/20] Add basic ACPI support for RISC-V

On Mon, Mar 06, 2023 at 09:51:09PM +0000, Conor Dooley wrote:
> Hey Sunil,
> 
> On Fri, Mar 03, 2023 at 07:06:27PM +0530, Sunil V L wrote:
> > This patch series enables the basic ACPI infrastructure for RISC-V.
> > Supporting external interrupt controllers is in progress and hence it is
> > tested using poll based HVC SBI console and RAM disk.
> > 
> > The first patch in this series is one of the patch from Jisheng's
> > series [1] which is not merged yet. This patch is required to support
> > ACPI since efi_init() which gets called before sbi_init() can enable
> > static branches and hits a panic.
> > 
> > Patch 2 and 3 are ACPICA patches which are not merged into acpica yet
> > but a PR is raised already.
> > 
> > Below are two ECRs approved by ASWG.
> > RINTC - https://drive.google.com/file/d/1R6k4MshhN3WTT-hwqAquu5nX6xSEqK2l/view
> > RHCT - https://drive.google.com/file/d/1nP3nFiH4jkPMp6COOxP6123DCZKR-tia/view
> > 
> > The series depends on Anup's IPI improvement series [2].
> > 
> > [1] https://lore.kernel.org/all/20220821140918.3613-1-jszhang@kernel.org/
> > [2] https://lore.kernel.org/lkml/20230103141221.772261-7-apatel@ventanamicro.com/T/
> 
> Building a clang-15 allmodconfig (I didn't try gcc) with this series, and
> Anup's IPI bits, results in a broken build, due to failings in cmpxchg:
> 
> /stuff/linux/drivers/platform/surface/aggregator/controller.c:61:25: error: call to __compiletime_assert_335 declared with 'error' attribute: BUILD_BUG failed
>         while (unlikely((ret = cmpxchg(&c->value, old, new)) != old)) {
>                                ^
Hi Conor,

I am able to build without any of these issues using clang-15. I am
wondering whether the base is proper. I had rebased on top of the master
and couple of patches from IPI series were already merged in the master.

Do you mind verifying with my branch
https://github.com/vlsunil/linux/commits/acpi_b1_us_review_ipi17_V3?

Or if you could provide me your branch details, I can look further.

Thanks!
Sunil

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