linux-kernel - Re: ..build stopped... Linux 5.9-rc1

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Message-ID: <CAHk-=wgOaEmFGYhnx7XLe8AbQKYpgMAzyuHuS8dYZoB2hS3C=A@mail.gmail.com>
Date:   Mon, 17 Aug 2020 09:44:45 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Bhaskar Chowdhury <unixbhaskar@...il.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: ..build stopped... Linux 5.9-rc1

On Sun, Aug 16, 2020 at 3:58 PM Bhaskar Chowdhury <unixbhaskar@...il.com> wrote:
>
> I am scared that I might have missed something very obvious ...am I?? And the build abort...take a peek..
>
> ./arch/x86/include/asm/io.h:292:2: error: implicit declaration of function ‘slow_down_io’ [-Werror=implicit-function-declaration]

I'm not seeing how that would happen with a pristine codebase, but
send me your config just in case.

slow_down_io() is declared not that much further up in that file (or
in paravirt.h that gets included before for the CONFIG_PARAVIRT case).

             Linus