linux-kernel - Re: [llvmlinux] [PATCH] Make alignment cflags configurable.

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Message-ID: <8053832.Ee8xMPbCUZ@aragorn.auenland.lan>
Date:	Thu, 13 Aug 2015 01:59:45 +0200
From:	Jan-Simon Moeller <dl9pf@....de>
To:	llvmlinux@...ts.linuxfoundation.org
Cc:	David Woodhouse <dwmw2@...radead.org>, tglx@...utronix.de,
	x86@...nel.org, mingo@...hat.com, linux-kernel@...r.kernel.org,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [llvmlinux] [PATCH] Make alignment cflags configurable.

Am Donnerstag, 13. August 2015, 00:37:05 schrieb David Woodhouse:
> On Thu, 2015-08-13 at 01:17 +0200, Jan-Simon Moeller wrote:
> > This way we can figure why it does not work for clang and keep things
> > as-is for gcc.
> 
> Let's figure it out first. Or at *least* bisect and find which kernel
> commit broke it.
> 
> Then we can talk about the best way to fix it.

I bisected it already.

down to -faling-jumps in

be6cb02779ca74d83481f017db21578cfe92891c is the first bad commit
commit be6cb02779ca74d83481f017db21578cfe92891c
Author: Ingo Molnar <mingo@...nel.org>
Date:   Fri Apr 10 14:08:46 2015 +0200

    x86: Align jump targets to 1-byte boundaries

Best,
Jan-Simon
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