libpciaccess: Changes to 'master'

[Keith Packard]

 src/linux_sysfs.c |    3 +++
 1 file changed, 3 insertions(+)

New commits:
commit b30d458202bc0304c705eb081b12ead860584bea
Author: Keith Packard <keithp at keithp.com>
Date:   Wed Apr 16 12:10:52 2008 -0700

    Kludge around linux bug and turn off write-through and cache-disable bits
    
    When mmaping the PCI device, the kernel turns on the write-through and
    cache-disable bits in the allocated PTEs. This disables write-combining mode
    and dramatically reduces write bandwidth to the frame buffer. While that
    should be fixed in the kernel, we'll kludge around it here by using mprotect
    to rewrite the PTEs and get those bits turned off.