linux-kernel - Re: [PATCH] ARM:mm: fix kmap_atomic_to

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Message-ID: <alpine.LFD.2.20.1510062136190.1531@knanqh.ubzr>
Date:	Tue, 6 Oct 2015 21:37:41 -0400 (EDT)
From:	Nicolas Pitre <nicolas.pitre@...aro.org>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
cc:	Chanho Min <chanho.min@....com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Jongsung Kim <neidhard.kim@....com>,
	Gunho Lee <gunho.lee@....com>
Subject: Re: [PATCH] ARM:mm: fix kmap_atomic_to_page

On Tue, 6 Oct 2015, Russell King - ARM Linux wrote:

> On Tue, Oct 06, 2015 at 08:09:33PM +0900, Chanho Min wrote:
> > Since kmap_atomic returns the pkmap address without a new mapping to
> > fixmap for the page that is already mapped by kmap, It should be
> > considered for the pkmap address in kmap_atomic_to_page.
> 
> What's the reasoning behind this change, given that I can find lots of
> definitions of kmap_atomic_to_page() in the kernel, but not a single
> user of this.
> 
> If there's no users, should we be deleting this code?

I think commit 5bbeed12bdc3 provides the answer to that question.


Nicolas
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