linux-kernel - Re: [PATCH v2] x86/lib/copy_user_64.S: Handle 4-byte nocache copy

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Message-ID: <20160209115358.GB4434@pd.tnic>
Date:	Tue, 9 Feb 2016 12:53:58 +0100
From:	Borislav Petkov <bp@...e.de>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Toshi Kani <toshi.kani@....com>, tglx@...utronix.de,
	mingo@...hat.com, hpa@...or.com, dan.j.williams@...el.com,
	ross.zwisler@...ux.intel.com, vishal.l.verma@...el.com,
	micah.parrish@....com, brian.boylston@....com, x86@...nel.org,
	linux-nvdimm@...ts.01.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] x86/lib/copy_user_64.S: Handle 4-byte nocache copy

On Tue, Feb 09, 2016 at 12:27:32PM +0100, Ingo Molnar wrote:
> Btw., IIRC GAS is being silly about .L, i.e. there's a difference between these 
> two variants:
> 
>  .Lerror_entry_from_usermode_swapgs:
>  .L_error_entry_from_usermode_swapgs:
> 
> the latter would be easier to read, but does not result in a local label last I 
> checked.
> 
> Right?

Seems to build ok here with "GNU assembler (GNU Binutils) 2.26.51.20151207".
Perhaps some bug with older gas...?

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--