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Date:   Thu, 22 Aug 2019 00:39:18 +0300
From:   Aaro Koskinen <aaro.koskinen@iki.fi>
To:     Geert Uytterhoeven <geert@linux-m68k.org>, Qian Cai <cai@lca.pw>
Cc:     Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Parisc List <linux-parisc@vger.kernel.org>,
        linux-rdma <linux-rdma@vger.kernel.org>,
        Greentime Hu <green.hu@gmail.com>,
        Vincent Chen <deanbo422@gmail.com>
Subject: Re: Build regressions/improvements in v5.3-rc5
Message-ID: <20190821213918.GE30291@darkstar.musicnaut.iki.fi>
References: <20190819081157.9736-1-geert@linux-m68k.org>
 <CAMuHMdV11Km7yF3gk5uTrPS1mVhjMdkbg28QRymcYyBPiAMBMw@mail.gmail.com>
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Hi,

On Mon, Aug 19, 2019 at 11:07:49AM +0200, Geert Uytterhoeven wrote:
> On Mon, Aug 19, 2019 at 10:47 AM Geert Uytterhoeven
> <geert@linux-m68k.org> wrote:
> > JFYI, when comparing v5.3-rc5[1] to v5.3-rc4[3], the summaries are:
> >   - build errors: +7/-0
> 
>   + /kisskb/src/include/asm-generic/5level-fixup.h: error: unknown
> type name 'pgd_t'; did you mean 'pid_t'?:  => 14:18
>   + /kisskb/src/include/asm-generic/pgtable.h: error: implicit
> declaration of function 'p4d_bad'; did you mean 'pgd_bad'?
> [-Werror=implicit-function-declaration]:  => 580:15
>   + /kisskb/src/include/asm-generic/pgtable.h: error: implicit
> declaration of function 'p4d_bad'; did you mean 'pud_bad'?
> [-Werror=implicit-function-declaration]:  => 580:15
>   + /kisskb/src/include/asm-generic/pgtable.h: error: implicit
> declaration of function 'p4d_none'; did you mean 'pgd_none'?
> [-Werror=implicit-function-declaration]:  => 578:6
>   + /kisskb/src/include/asm-generic/pgtable.h: error: implicit
> declaration of function 'p4d_none'; did you mean 'pud_none'?
> [-Werror=implicit-function-declaration]:  => 578:6
> 
> parisc-defconfig

This commit broke PA-RISC build:

0cfaee2af3a04c0be5f056cebe5f804dedc59a43 is the first bad commit
commit 0cfaee2af3a04c0be5f056cebe5f804dedc59a43
Author: Qian Cai <cai@lca.pw>
Date:   Tue Aug 13 15:37:47 2019 -0700  

    include/asm-generic/5level-fixup.h: fix variable 'p4d' set but not used

A.