guest additions do not build with 3.11 kernel

[robatino]

Error from Fedora Rawhide x86_64 guest with the first 3.11 kernel:

depmod: WARNING: /lib/modules/3.11.0-0.rc0.git2.1.fc20.x86_64/kernel/drivers/char/crash.ko needs unknown symbol page_is_ram
Error! Bad return status for module build on kernel: 3.11.0-0.rc0.git2.1.fc20.x86_64 (x86_64)
Consult /var/lib/dkms/vboxguest/4.2.16/build/make.log for more information.

[robatino]

/var/lib/dkms/vboxguest/4.2.16/build/make.log

[robatino]

VBox.log

[smo]

The problem is due to the removal of readdir from struct file in linux 3.11 in favour of a new field - iterate.

For inspiration on how to fix, perhaps one could look at the patch for the equivalent VMWare functionality shown at  http://mysticalzero.blogspot.dk/2013/07/vmblock-patch-for-linux-311-rc1-vmware.html.

[logatron]

Looks like a patch was committed to fix this: https://www.virtualbox.org/changeset/47588/vbox/trunk/src/VBox/Additions/linux/sharedfolders/dirops.c

[robatino]

With VirtualBox 4.2.18, the guest additions build successfully both for 3.11 and the early 3.12 kernels, so hopefully there will be no additional problems with 3.12. Unfortunately, after installing the GA, X no longer comes up properly - I just get a black screen of the expected resolution. I can get to a VT, though.

[robatino]

Although the guest additions were building with the earlier 3.12 kernels, they don't with the latest (kernel-3.12.0-0.rc0.git14.2.fc21). Filed https://www.virtualbox.org/ticket/12083 .