linux-kernel - Re: [PATCH] sparc64: Export flush_ptrace

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Message-ID: <20130906125839.GB6396@infradead.org>
Date:	Fri, 6 Sep 2013 05:58:39 -0700
From:	Christoph Hellwig <hch@...radead.org>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	"David S. Miller" <davem@...emloft.net>,
	sparclinux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sparc64: Export flush_ptrace_access() (needed by lustre)

On Fri, Sep 06, 2013 at 05:56:13AM -0700, Christoph Hellwig wrote:
> On Thu, Sep 05, 2013 at 11:08:29AM +0200, Geert Uytterhoeven wrote:
> > ERROR: "flush_ptrace_access" [drivers/staging/lustre/lustre/libcfs/libcfs.ko]
> > undefined!
> 
> This seems to be more copy_to_user_page fallout, so instead of all these
> arch patches we should figure out why lustre absolutely wants to use
> this API that so far has been for core MM code only.

Looking at the code is seems to be for a reimplementation of
__access_remote_vm.  So at very least it should use that, but I still
requiestion why it's doing that at all.

Geert, please don't just export stuff for staging/ use only.   Code
wouldn't be in staging if it weren't a steaming pile of junk, so
adjusting anyting in the real tree for it needs proper discussion first.

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