linux-kernel - Re: [PATCH] MIPS: Fix HIGHMEM crash in __update

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Message-ID: <20150410134711.GC21107@linux-mips.org>
Date:	Fri, 10 Apr 2015 15:47:11 +0200
From:	Ralf Baechle <ralf@...ux-mips.org>
To:	Lars Persson <lars.persson@...s.com>
Cc:	paul.burton@...tec.com, linux-mips@...ux-mips.org,
	linux-kernel@...r.kernel.org, Lars Persson <larper@...s.com>
Subject: Re: [PATCH] MIPS: Fix HIGHMEM crash in __update_cache().

On Fri, Apr 10, 2015 at 03:21:24PM +0200, Lars Persson wrote:

> Commit 8b5fe5e54b47 ("MIPS: Fix race condition in lazy cache flushing.")
> triggered NULL pointer dereferences on systems with HIGHMEM.
> 
> The problem was caused by not clearing the PG_dcache_dirty flag in
> flush_icache_page() and thus we enter __update_cache() that lacks
> support for HIGHMEM.

Thanks, I've folded this patch into the original 8b5fe5e54b47 commit.

  Ralf
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