From: Andi Kleen <ak@suse.de>
Date: Sat, 23 Jun 2007 00:29:25 +0000 (+0200)
Subject: x86_64: Ignore compat mode SYSCALL when IA32_EMULATION is not defined
X-Git-Tag: v2.6.22-rc6~34
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=75154f402ef18e459ff97ddece25656b6c2b329c;p=pandora-kernel.git

x86_64: Ignore compat mode SYSCALL when IA32_EMULATION is not defined

Previously a program could switch to a compat mode segment and then
execute SYSCALL and it would jump to an uninitialized MSR and crash
the kernel.

Instead supply a dummy target for this case.

Pointed out by Jan Beulich

Cc: jbeulich@novell.com
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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