linux-kernel - Re: [PATCH 1/6] Kbuild: compile kernel with gnu11 std

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Date:   Tue, 1 Mar 2022 13:04:26 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     kernel test robot <lkp@...el.com>,
        Xiaomeng Tong <xiam0nd.tong@...il.com>,
        kbuild-all@...ts.01.org, Jakob Koschel <jakobkoschel@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kees Cook <keescook@...omium.org>,
        Jann Horn <jannh@...gle.com>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>, Netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH 1/6] Kbuild: compile kernel with gnu11 std

On Tue, Mar 1, 2022 at 12:54 PM Arnd Bergmann <arnd@...db.de> wrote:
>
> gcc-11 only shows the one line warning here.

What an odd warning. Not even a filename, much less a line number?

> The source is
>
> /* PCI CFG04 status fields */
> #define PCI_CFG04_STAT_BIT      16
> #define PCI_CFG04_STAT          0xffff0000
> #define PCI_CFG04_STAT_66_MHZ   (1 << 21)
> #define PCI_CFG04_STAT_FBB      (1 << 23)
> #define PCI_CFG04_STAT_MDPE     (1 << 24)
> #define PCI_CFG04_STAT_DST      (1 << 25)
> #define PCI_CFG04_STAT_STA      (1 << 27)
> #define PCI_CFG04_STAT_RTA      (1 << 28)
> #define PCI_CFG04_STAT_RMA      (1 << 29)
> #define PCI_CFG04_STAT_SSE      (1 << 30)
> #define PCI_CFG04_STAT_PE       (1 << 31)
> #define KORINA_STAT             (PCI_CFG04_STAT_MDPE | \
>                                  PCI_CFG04_STAT_STA | \
>                                  PCI_CFG04_STAT_RTA | \
>                                  PCI_CFG04_STAT_RMA | \
>                                  PCI_CFG04_STAT_SSE | \
>                                  PCI_CFG04_STAT_PE)
> #define KORINA_CNFG1            ((KORINA_STAT<<16)|KORINA_CMD)

Yeah, looks like that "<< 16" is likely just wrong.

I'm guessing that that KORINA_CNFG1 thing either ends up not
mattering, or - probably more likely - nobody really used that
platform at all. It has had pretty much zero updates sinced 2008.

               Linus