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Date: Tue, 28 Nov 2017 10:04:42 -0800
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: Joe Perches <joe@...ches.com>
Cc: "Eric W. Biederman" <ebiederm@...ssion.com>, "Tobin C. Harding" <me@...in.cc>, 
	"Jason A. Donenfeld" <Jason@...c4.com>, "Theodore Ts'o" <tytso@....edu>, Kees Cook <keescook@...omium.org>, 
	Paolo Bonzini <pbonzini@...hat.com>, Tycho Andersen <tycho@...ho.ws>, 
	"Roberts, William C" <william.c.roberts@...el.com>, Tejun Heo <tj@...nel.org>, 
	Jordan Glover <Golden_Miller83@...tonmail.ch>, Greg KH <gregkh@...uxfoundation.org>, 
	Petr Mladek <pmladek@...e.com>, Ian Campbell <ijc@...lion.org.uk>, 
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>, Catalin Marinas <catalin.marinas@....com>, 
	Will Deacon <wilal.deacon@....com>, Steven Rostedt <rostedt@...dmis.org>, 
	Chris Fries <cfries@...gle.com>, Dave Weinstein <olorin@...gle.com>, 
	Daniel Micay <danielmicay@...il.com>, Djalal Harouni <tixxdz@...il.com>, 
	Radim Krčmář <rkrcmar@...hat.com>, 
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, KVM list <kvm@...r.kernel.org>, 
	"kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>
Subject: Re: [PATCH 0/5] add printk specifier %px, unique identifier

On Tue, Nov 28, 2017 at 9:41 AM, Joe Perches <joe@...ches.com> wrote:
>
> Perhaps if there are really tools that parse this
> the [<leading-0-width>] should be kept the same too.

If we really get failures, we can do that.

But since the width is already different on 32-bit and 64-bit, I
seriously doubt there are any tools that would care about the width.
They'd already be horribly broken.

So let's not waste space with pointless zeroes unless somebody finds a
case where it matters.

            Linus

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