linux-kernel - Re: build failure of next-20221005 due to 4078ec1ef5ed ("LoongArch: Use TLB for ioremap()")

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Date:   Wed, 5 Oct 2022 13:54:26 +0100
From:   Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:     Huacai Chen <chenhuacai@...nel.org>
Cc:     Huacai Chen <chenhuacai@...ngson.cn>,
        WANG Xuerui <kernel@...0n.name>, loongarch@...ts.linux.dev,
        linux-kernel@...r.kernel.org, linux-next@...r.kernel.org
Subject: Re: build failure of next-20221005 due to 4078ec1ef5ed ("LoongArch:
 Use TLB for ioremap()")

On Wed, Oct 5, 2022 at 1:30 PM Huacai Chen <chenhuacai@...nel.org> wrote:
>
> Hi, Sudip,
>
> This seems a false positive. When the implementation of iounmap() is
> empty (but this is completely legal I think), these drivers will cause
> "unused variable error".

And that error will fail the build as allmodconfig will have CONFIG_WERROR=y.

-- 
Regards
Sudip