linux-kernel - Re: [tip: objtool/core] x86/insn: Support big endian cross-compiles

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Message-ID: <20201009203822.GA2974@worktop.programming.kicks-ass.net>
Date:   Fri, 9 Oct 2020 22:38:22 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     linux-kernel@...r.kernel.org
Cc:     linux-tip-commits@...r.kernel.org,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>, x86 <x86@...nel.org>
Subject: Re: [tip: objtool/core] x86/insn: Support big endian cross-compiles

On Wed, Oct 07, 2020 at 04:20:19PM -0000, tip-bot2 for Martin Schwidefsky wrote:
> The following commit has been merged into the objtool/core branch of tip:
> 
> Commit-ID:     2a522b53c47051d3bf98748418f4f8e5f20d2c04
> Gitweb:        https://git.kernel.org/tip/2a522b53c47051d3bf98748418f4f8e5f20d2c04
> Author:        Martin Schwidefsky <schwidefsky@...ibm.com>
> AuthorDate:    Mon, 05 Oct 2020 17:50:31 +02:00
> Committer:     Josh Poimboeuf <jpoimboe@...hat.com>
> CommitterDate: Tue, 06 Oct 2020 09:32:29 -05:00
> 
> x86/insn: Support big endian cross-compiles
> 
> x86 instruction decoder code is shared across the kernel source and the
> tools. Currently objtool seems to be the only tool from build tools needed
> which breaks x86 cross compilation on big endian systems. Make the x86
> instruction decoder build host endianness agnostic to support x86 cross
> compilation and enable objtool to implement endianness awareness for
> big endian architectures support.
> 
> Signed-off-by: Martin Schwidefsky <schwidefsky@...ibm.com>
> Co-developed-by: Vasily Gorbik <gor@...ux.ibm.com>
> Signed-off-by: Vasily Gorbik <gor@...ux.ibm.com>
> Acked-by: Masami Hiramatsu <mhiramat@...nel.org>
> Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com>

This commit breaks the x86 build with CONFIG_X86_DECODER_SELFTEST=y.

I've asked Boris to truncate tip/objtool/core.