linux-kernel - Re: Promoting Crusoe and Geode Processors to i686 Status

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Date:	Wed, 8 Sep 2010 01:27:49 +0100
From:	Nick Lowe <nick.lowe@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Re: Promoting Crusoe and Geode Processors to i686 Status

Two further questions...

1) Is there a benefit to keeping a CONFIG_MGEODEGX1 and
CONFIG_MGEODE_LX when we have a situation where i686
CONFIG_X86_GENERIC builds work?

# Geode GX1 support
cflags-$(CONFIG_MGEODEGX1)      += -march=pentium-mmx
cflags-$(CONFIG_MGEODE_LX)      += $(call
cc-option,-march=geode,-march=pentium-mmx)

2) Should there be the special case that forces the suboptimal
-mtune=generic32 to work around the binutils NOPL bug or, as I think,
should people just update to a sane binutils version? (It's a special
case triggered where CONFIG_X86_P6_NOP is not set.)

# Bug fix for binutils: this option is required in order to keep
# binutils from generating NOPL instructions against our will.
ifneq ($(CONFIG_X86_P6_NOP),y)
cflags-y                        += $(call
cc-option,-Wa$(comma)-mtune=generic32,)
endif

Reference: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=arch/x86/Makefile_32.cpu;hb=HEAD

Cheers,

Nick
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