linux-kernel - Re: [PATCH 01/27] ptrace: arch_has_single

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Date:	Tue, 27 Nov 2007 11:38:46 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Roland McGrath <roland@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH 01/27] ptrace: arch_has_single_step


* Andrew Morton <akpm@...ux-foundation.org> wrote:

> On Sun, 25 Nov 2007 13:55:07 -0800 (PST) Roland McGrath <roland@...hat.com> wrote:
> 
> > This defines the new macro arch_has_single_step() in linux/ptrace.h, 
> > a default for when asm/ptrace.h does not define it.  It declares the 
> > new user_enable_single_step and user_disable_single_step functions. 
> > This is not used yet, but paves the way to harmonize on this 
> > interface for the arch-specific calls on all machines.
> 
> I think I'll duck this lot for now in view of the (relatively small) 
> amount of followup.
> 
> I did do an experimental will-it-apply and got a tremendous number of 
> rejects against the x86 git tree, almost all of which went away when 
> `patch -l' was used.  Seems that someone has gone on a whitespace 
> rampage through arch/x86/ia32/ptrace32.c and arch/x86/ia32/ptrace64.c.
> 
> That's kinda/sorta OK, but `patch -l' is a bit more inclined to 
> misplace hunks and it's all a bit risky.

actually, Thomas tried a tentative merge two days ago or so and the 
result was pretty OK and functional. I'll try to do a more formal merge 
and see what comes up.

	Ingo
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