From: Andy Lutomirski <luto@mit.edu>
Date: Wed, 13 Jul 2011 13:24:09 +0000 (-0400)
Subject: x86-64: Improve vsyscall emulation CS and RIP handling
X-Git-Tag: v3.1-rc1~283^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c9712944b2a12373cb6ff8059afcfb7e826a6c54;p=pandora-kernel.git

x86-64: Improve vsyscall emulation CS and RIP handling

Three fixes here:
 - Send SIGSEGV if called from compat code or with a funny CS.
 - Don't BUG on impossible addresses.
 - Add a missing local_irq_disable.

This patch also removes an unused variable.

Signed-off-by: Andy Lutomirski <luto@mit.edu>
Link: http://lkml.kernel.org/r/6fb2b13ab39b743d1e4f466eef13425854912f7f.1310563276.git.luto@mit.edu
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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