linux-kernel - Re: [PATCH 0/5] x86: IA32 emulation cleanups

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Message-ID: <54F8DAC9.1070304@zytor.com>
Date:	Thu, 05 Mar 2015 14:38:01 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Brian Gerst <brgerst@...il.com>, Ingo Molnar <mingo@...nel.org>
CC:	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Borislav Petkov <bp@...en8.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 0/5] x86: IA32 emulation cleanups

On 03/03/2015 10:22 PM, Brian Gerst wrote:
> 
> It looks like most cases can simply be replaced.  There are some
> subtle relations with the x32 ABI though, and that will take some time
> to sort out.
> 

Yes, some aspects of CONFIG_COMPAT is used also by x32.

Overall the current Linux kernel handles the case of *more* than two
ABIs extremely poorly.  It is not the only case of more than two ABIs,
either; consider ARM for example.

	-hpa


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