linux-kernel - Re: [RFC PATCH 0/7] x86/entry: Create a home for the x86 entry code in arch/x86/entry/

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Message-ID: <20150603171650.GA15858@gmail.com>
Date:	Wed, 3 Jun 2015 19:16:50 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	Brian Gerst <brgerst@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Borislav Petkov <bp@...en8.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [RFC PATCH 0/7] x86/entry: Create a home for the x86 entry code
 in arch/x86/entry/


* Andy Lutomirski <luto@...capital.net> wrote:

> On Wed, Jun 3, 2015 at 10:11 AM, Ingo Molnar <mingo@...nel.org> wrote:
> >
> > * H. Peter Anvin <hpa@...or.com> wrote:
> >
> >> I like the patch set (and you can add my Acked-by:) *except* 7/7, and the reason
> >> for that is that it really isn't entry code, it is user space code.
> >
> > Well, I think arch/x86/entry/ should be a broader category for all things entry
> > code: and the vsyscall code is closely related to the syscall entry/exit code so
> > it's in a better place there than just being in the generic arch/x86/kernel/
> > directory.
> >
> > I kept it separate in arch/x86/entry/vsyscall/ so it doesn't mix with other entry
> > code.
> 
> ...and my reading comprehension is way off this morning.  You already called it 
> arch/x86/entry, so there was no reason for me to suggest that :)
> 
> Anyway, arch/x86/entry/vdso isn't so bad.  It's just a bit odd sounding to me.

We could make it arch/x86/sys/? Sounds a bit too generic though.

Didn't want to limit it to system calls only, because there's various other entry 
methods (irqs, traps, NMI, etc.) that we want to handle in a coherent fashion. 
[ Which you are intimately aware of ;-) ]

Thanks,

	Ingo
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