Bah, I think I found the problem:
+static inline void *drm_vmalloc_dma(unsigned long size)
+{
+#if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE)
+ return __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM,
+ PAGE_KERNEL | _PAGE_NO_CACHE);
+#else
+ return vmalloc_32(size);
+#endif
+}
+
Remove the GFP_HIGHMEM from the above. It looks like our cache
flushing isn't going to work for highmem, it would need some
kmap's for that.
Ben.
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