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Date:	Wed, 02 Jul 2014 15:39:25 +0900
From:	Masami Hiramatsu <>
To:	Michael Ellerman <>
Cc:	Benjamin Herrenschmidt <>,
	Paul Mackerras <>,
	Tony Luck <>,
	Jeremy Fitzhardinge <>,,,
	"H. Peter Anvin" <>, Ingo Molnar <>,,,,
	"Suzuki K. Poulose" <>,
	Fenghua Yu <>,
	Arnd Bergmann <>,
	Rusty Russell <>,
	Chris Wright <>,,
	Thomas Gleixner <>,
	Tony Luck <>,
	Kevin Hao <>,
	Ananth N Mavinakayanahalli <>,,,
	Linux Kernel Mailing List <>,, Andrew Morton <>,
	Linus Torvalds <>,
	"David S. Miller" <>
Subject: Re: Re: Re: [PATCH v4] [BUGFIX] kprobes: Fix "Failed to find blacklist"
 error on ia64 and ppc64

(2014/07/02 13:41), Michael Ellerman wrote:
> On Tue, 2014-07-01 at 11:21 +0900, Masami Hiramatsu wrote:
>> (2014/06/30 20:36), Michael Ellerman wrote:
>>> On Mon, 2014-06-30 at 12:14 +0900, Masami Hiramatsu wrote:
>>>> Ping? :)
>>> Yeah sorry. I started looking at this and got dragged into another mess.
>>> You seem to have duplicated the functionality of arch_deref_entry_point(),
>>> which was also added for kprobes, and for the same reason - ie. because some
>>> arches have strange function pointers. Is there some reason you can't use it?
>> Ah, right! Hmm, it seems some more work to update it. but basically, we can do.
>> BTW, is there any other users who need to access the actual function entry (for
>> kallsyms case)?
> Not that I'm aware of. We have had function descriptors on 64-bit powerpc for
> ever, so in theory by now we should have already found any cases where we need
> that sort of wrapper.

OK, then I'll update this patch to use arch_deref_entry_point(), and add additional
patch which update to support PPC64 ABIv2.

Thank you!

Software Platform Research Dept. Linux Technology Research Center
Hitachi, Ltd., Yokohama Research Laboratory

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