Ref Bug#365
http://marcbug.scc-dc.com/bugzilla3/show_bug.cgi?id=365
For users still using sccKit 1.4.1.x (Kernel version 2.6.38)
Darko Petrovic has posted a patch for the ioremap_prot ignores _PAGE_PSE bug.
Below is Darko's description:
When using ioremap_prot() to map pages in the kernel, _PAGE_PSE flag is
completely ignored. As this flag is used to mark MPBT, it is not possible to
directly use this type when writing modules.
However, some modules that use the MPB (rckmb.c and rckpc.c, for example) rely
on this functionality in ioremap_prot(). A consequence is that they are very
slow, as the Write-Combine buffer is not used. Another, more severe
consequence, is that the L2 cache is not avoided, which might create some data
consistency problems in certain scenarios.
I have fixed the bug by slightly changing some masks and switch statements in
ioremap_prot() and __ioremap_caller(). The patch is attached.
