[Qemu-devel] [PATCH] efault - verify pages are in cache and are read/write

[Thayne Harbaugh]

This patch adds the function page_check_range() to verify that pages are
in the cache and that they are appropriately readable/writable.  It also
hooks up access_ok() to page_check_range() so that code patterns are
similar to kernel code.

When copying data from user space access_ok() is used to check that
pages are readable.  When copying data to user space access_ok() is used
to check that pages are writable.

06_efault.patch.1.1
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