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Date: Wed, 6 Dec 2017 21:29:24 -0800
From: Linus Torvalds <>
To: tcharding <>
Cc: Sergey Senozhatsky <>, 
	Geert Uytterhoeven <>, Randy Dunlap <>, 
	David Laight <>, Kees Cook <>, 
	"" <>, 
	"Jason A. Donenfeld" <>, "Theodore Ts'o" <>, Paolo Bonzini <>, 
	Tycho Andersen <>, "Roberts, William C" <>, Tejun Heo <>, 
	Jordan Glover <>, Greg KH <>, 
	Petr Mladek <>, Joe Perches <>, Ian Campbell <>, 
	Sergey Senozhatsky <>, Catalin Marinas <>, 
	Will Deacon <>, Steven Rostedt <>, 
	Chris Fries <>, Dave Weinstein <>, 
	Daniel Micay <>, Djalal Harouni <>, 
	Radim Krcm√°r <>, 
	Linux Kernel Mailing List <>, Network Development <>, 
	David Miller <>, Stephen Rothwell <>, 
	Andrey Ryabinin <>, Alexander Potapenko <>, 
	Dmitry Vyukov <>, Andrew Morton <>
Subject: Re: [PATCH V11 4/5] vsprintf: add printk specifier %px

On Dec 6, 2017 21:17, "Tobin C. Harding" <> wrote:

> hm, indeed. and !CONFIG_KALLSYMS config turns %pS/%ps
> into special_hex_number().

But totally misses this :(

"<no-sym>" would be better returned when !CONFIG_KALLSYMS, right?

No, we still want those configurations to be debuggable.

If !CONFIG_KALLSYMS, we'll just continue print the hex number. It's not a
normal configuration, leaking an address there is fine, and preferable to
"cannot debug"


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