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Re: [PATCH 02/36] Add Cavium OCTEON files to arch/mips/include/asm/mach-

To: David Daney <ddaney@caviumnetworks.com>
Subject: Re: [PATCH 02/36] Add Cavium OCTEON files to arch/mips/include/asm/mach-cavium-octeon
From: Ralf Baechle <ralf@linux-mips.org>
Date: Wed, 29 Oct 2008 01:29:11 +0000
Cc: linux-mips@linux-mips.org, Tomaso Paoletti <tpaoletti@caviumnetworks.com>, Paul Gortmaker <Paul.Gortmaker@windriver.com>
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On Tue, Oct 28, 2008 at 04:51:34PM -0700, David Daney wrote:

>> It also means the resulting kernel won't have support for futex which
>> essentially means you're cut off from modern libcs.
>>
>> It is possible to get this to work - but nobody bothered so far; ll/sc-less
>> R2000 class processors are very rare these days.  My recommendation is
>> to keep cpu_has_llsc as 1 until you've fixed up the futex implementation,
>> if you deciede so.
>
> Someone should tell ip32 w/ R5000 this.  It seems that it is broken too.
>
> This could explain why my R5000 O2 does weird things with glibc 2.8...

The R5000 has a hardware bug with LL/SC on XKPHYS addresses so we
can't ...

  Ralf

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