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From:   youling 257 <youling257@gmail.com>
Date:   Sun, 12 Apr 2020 01:30:34 +0800
Message-ID: <CAOzgRdZyueBhX+jzpgSgdyeto830O444SwmxaLEAQzSsEaGczg@mail.gmail.com>
Subject: Re: Merge branch 'core-objtool-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
To:     Peter Zijlstra <peterz@infradead.org>
Cc:     viro@zeniv.linux.org.uk, jpoimboe@redhat.com,
        linux-kernel@vger.kernel.org
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i build 64bit kernel on 32bit host. please fix.

2020-04-09 15:38 GMT+08:00, Peter Zijlstra <peterz@infradead.org>:
> On Thu, Apr 09, 2020 at 10:00:53AM +0800, youling 257 wrote:
>> d937a6dfc9428f470c3ce4d459c390944ddef538 caused 64bit kernel build
>> failed on 32bit userspace.
>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commi=
t/?id=3Dd937a6dfc9428f470c3ce4d459c390944ddef538
>>
>> 2020-04-08 16:13 GMT+08:00, youling 257 <youling257@gmail.com>:
>> > after this merge branch, build 64bit kernel failed on 32bit userspace.
>> >
>> >
>> >   CC       tools/objtool/builtin-check.o
>> >   CC       tools/objtool/builtin-orc.o
>> > In file included from check.h:10,
>> >                  from builtin-check.c:18:
>> > elf.h: In function =E2=80=98sec_offset_hash=E2=80=99:
>> > elf.h:102:14: error: right shift count >=3D width of type
>> > [-Werror=3Dshift-count-overflow]
>> >   102 |  oh =3D offset >> 32;
>> >       |              ^~
>
> Oh right; I figured it wouldn't matter since we don't do objtool for
> 32bit kernels, but I suppose you're cross building a 64bit kernel on a
> 32bit host or something daft like that?
>
> I'll go fix it.
>