From e1d12606f756bdb8328a66a2873dca6c46bcb4e5 Mon Sep 17 00:00:00 2001
From: Rusty Russell <rusty@rustcorp.com.au>
Date: Mon, 22 Apr 2013 14:10:39 +0930
Subject: [PATCH] lguest: make check_gpte et. al return bool.

This is a bit neater: we can immediately return if a PTE/PGD/PMD entry
is invalid (which also kills the guest).  It means we don't risk using
invalid entries as we reshuffle the code.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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