> Well, the main thing is the implementation of kmap and kmap_atomic. > > They both basically assumes that all the reserved PTEs for kmap and > kmap_atomic are in a single PTE page since it uses a simple addition > (substraction for _atomic really but heh, that's about the same). > > Note that PKMAP (kmap) and FIXMAP (kmap_atomic) can be in two different > PTE pages. But it's important that the whole PKMAP is entirely contained > within a PTE page. It doesn't have to -start- on a PTE page boundary > though.
Also note that if you end up with PKMAP and FIXMAP on two different PTE pages, make sure they are both instanciated at boot time. Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
