linux-kernel - Re: [PATCH v4] [BUGFIX] kprobes: Fix "Failed to find blacklist" error on ia64 and ppc64

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Message-ID: <1404128176.7888.1.camel@concordia>
Date:	Mon, 30 Jun 2014 21:36:16 +1000
From:	Michael Ellerman <mpe@...erman.id.au>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Tony Luck <tony.luck@...il.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	linux-ia64@...r.kernel.org, sparse@...isli.org,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...nel.org>,
	linux-tip-commits@...r.kernel.org, akataria@...are.com,
	anil.s.keshavamurthy@...el.com,
	"Suzuki K. Poulose" <suzuki@...ibm.com>,
	Fenghua Yu <fenghua.yu@...el.com>,
	Arnd Bergmann <arnd@...db.de>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Chris Wright <chrisw@...s-sol.org>,
	yrl.pp-manager.tt@...achi.com,
	Thomas Gleixner <tglx@...utronix.de>,
	Tony Luck <tony.luck@...el.com>,
	Kevin Hao <haokexin@...il.com>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	linuxppc-dev@...ts.ozlabs.org, rdunlap@...radead.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	dl9pf@....de, Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH v4] [BUGFIX] kprobes: Fix "Failed to find blacklist"
 error on ia64 and ppc64

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?

cheers


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