linux-kernel - Re: [PATCH v7 1/3] x86: Add classes to exception tables

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Message-ID: <CA+55aFx7_sP_R+n6c3Ew=KVcwJwwgXhB57pSG9Kh24oiAqd+vw@mail.gmail.com>
Date:	Wed, 6 Jan 2016 09:48:31 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	"Luck, Tony" <tony.luck@...el.com>
Cc:	Borislav Petkov <bp@...en8.de>, Peter Anvin <hpa@...or.com>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andy Lutomirski <luto@...nel.org>,
	Dan Williams <dan.j.williams@...el.com>, elliott@....com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	"linux-nvdimm@...ts.01.org" <linux-nvdimm@...1.01.org>,
	"the arch/x86 maintainers" <x86@...nel.org>
Subject: Re: [PATCH v7 1/3] x86: Add classes to exception tables

On Wed, Jan 6, 2016 at 9:35 AM, Luck, Tony <tony.luck@...el.com> wrote:
>
> Linus, Peter, Ingo, Thomas: Can we head this direction? The code is cleaner
> and more flexible. Or should we stick with Andy's clever way to squeeze a
> couple of "class" bits into the fixup field of the exception table?

I'd rather not be clever in order to save just a tiny amount of space
in the exception table, which isn't really criticial for anybody.

So I think Borislav's patch has the advantage of being pretty
straightforward and allowing arbitrary fixups, in case we end up
having localized special cases..

               Linus
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