linux-kernel - [PATCH RFC] ARM: mm: Fix for highmem on machines with more than 14 cores

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Message-ID: <cover.1395692531.git.anders.berg@lsi.com>
Date:	Mon, 24 Mar 2014 22:02:11 +0100
From:	Anders Berg <anders.berg@....com>
To:	Russell King <linux@....linux.org.uk>,
	Nicolas Pitre <nicolas.pitre@...aro.org>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, Anders Berg <anders.berg@....com>
Subject: [PATCH RFC] ARM: mm: Fix for highmem on machines with more than 14 cores

Hi,

While working of platform support for the LSI AXM5516 SoC (a 16 x A15 device)
we ran into this limitation in fixmap.h where there is not enough room for the
per-cpu pages if NR_CPUS is set to 16.

The following patch avoids the overlap by lowering the base address according to
the values of NR_CPUS and KM_TYPE_NR. Is this the way to handle this?

Thanks,
Anders


Anders Berg (1):
  ARM: mm: Fix for highmem on machines with more than 14 cores

 arch/arm/include/asm/fixmap.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

-- 
1.8.3.2

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