Re: ARM/kirkwood: v3.12-rc6: kernel BUG at mm/util.c:390!

From: Ming Lei
Date: Sun Oct 27 2013 - 09:17:23 EST

On Sun, Oct 27, 2013 at 8:50 PM, Aaro Koskinen <aaro.koskinen@xxxxxx> wrote:
> On ARM v3.9 or older kernels do not trigger this BUG, at seems it only
> started to appear with the following commit (bisected):
> commit 1bc39742aab09248169ef9d3727c9def3528b3f3
> Author: Simon Baatz <gmbnomis@xxxxxxxxx>
> Date: Mon Jun 10 21:10:12 2013 +0100
> ARM: 7755/1: handle user space mapped pages in flush_kernel_dcache_page

The above commit only starts to implement the helper on ARM,
but according to Documentation/cachetlb.txt, looks caller of
flush_kernel_dcache_page() should make sure the passed
'page' is a user space page.

Ming Lei
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