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From: Stephen Rothwell <sfr@canb.auug.org.au>
To: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Peter Zijlstra <peterz@infradead.org>,
	linux-next@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] objtool: Disable stack validation when CROSS_COMPILE is used
Date: Wed, 2 Mar 2016 13:27:35 +1100
Message-ID: <20160302132735.37262b34@canb.auug.org.au> (raw)
In-Reply-To: <20160301215451.GC4852@treble.redhat.com>

Hi Josh,

On Tue, 1 Mar 2016 15:54:51 -0600 Josh Poimboeuf <jpoimboe@redhat.com> wrote:
>
> Changing it to use the host compiler would probably be an easy fix, but
> that would expose a harder bug related to endianness.

Just by luck, my PowerPC host is little endian :-)

> How about the below workaround patch to disable objtool and warn when
> CROSS_COMPILE is used?  If anybody complains about lack of cross-compile
> support later, we could try to fix it then.

This seems reasonable.

> From a3c65947011a420743f308b698171c4209105d3f Mon Sep 17 00:00:00 2001
> Message-Id: <a3c65947011a420743f308b698171c4209105d3f.1456868910.git.jpoimboe@redhat.com>
> From: Josh Poimboeuf <jpoimboe@redhat.com>
> Date: Tue, 1 Mar 2016 13:35:51 -0600
> Subject: [PATCH] objtool: Disable stack validation when CROSS_COMPILE is used

I have applied this to the merge of the tip tree in linux-next today
and it compiles fine for me.  I will continue applying it until
something better comes along or it is applied to the tip tree.

Thanks for that.
-- 
Cheers,
Stephen Rothwell

  reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-01  1:29 linux-next: build failure after merge of the tip tree Stephen Rothwell
2016-03-01  7:07 ` Ingo Molnar
2016-03-01  7:28   ` Sedat Dilek
2016-03-01  7:39     ` H. Peter Anvin
2016-03-01  8:41       ` Sedat Dilek
2016-03-01  9:45       ` Ingo Molnar
2016-03-01  9:40   ` Stephen Rothwell
2016-03-01 21:54     ` [PATCH] objtool: Disable stack validation when CROSS_COMPILE is used Josh Poimboeuf
2016-03-02  2:27       ` Stephen Rothwell [this message]
2016-03-02 21:17         ` Josh Poimboeuf
2016-03-02 22:21           ` Stephen Rothwell
2016-03-03  7:31         ` Sedat Dilek
2016-03-03  7:57           ` Stephen Rothwell

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