linux-kernel - uml: fix processor selection to exclude unsupported processors and features

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Message-Id: <11610971243583-git-send-email-blaisorblade@yahoo.it>
Date:	Tue, 17 Oct 2006 16:58:44 +0200
From:	Paolo 'Blaisorblade' Giarrusso <blaisorblade@...oo.it>
To:	stable@...nel.org
Cc:	Jeff Dike <jdike@...toit.com>, linux-kernel@...r.kernel.org,
	user-mode-linux-devel@...ts.sourceforge.net,
	Paolo 'Blaisorblade' Giarrusso <blaisorblade@...oo.it>
Subject: uml: fix processor selection to exclude unsupported processors and features

Makes UML compile on any possible processor choice. The two problems were:

*) x86 code, when 386 is selected, checks at runtime boot_cpuflags, which we do
   not have.
*) 3Dnow support for memcpy() et al. does not compile currently and fixing this
   is not trivial, so simply disable it; with this change, if one selects MK7
   UML compiles (while it did not).
Merged upstream; I'm resending since spam filters blocked my previous mail.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@...oo.it>
Index: linux-2.6.git/arch/i386/Kconfig.cpu
===================================================================
--- linux-2.6.git.orig/arch/i386/Kconfig.cpu
+++ linux-2.6.git/arch/i386/Kconfig.cpu
@@ -7,6 +7,7 @@ choice
 
 config M386
 	bool "386"
+	depends on !UML
 	---help---
 	  This is the processor type of your CPU. This information is used for
 	  optimizing purposes. In order to compile a kernel that can run on
@@ -301,7 +302,7 @@ config X86_USE_PPRO_CHECKSUM
 
 config X86_USE_3DNOW
 	bool
-	depends on MCYRIXIII || MK7 || MGEODE_LX
+	depends on (MCYRIXIII || MK7 || MGEODE_LX) && !UML
 	default y
 
 config X86_OOSTORE
-
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