creating a branch for only some files of a module

[Urs Thuermann]

Is it possible to create a branch for only some files of a module (all
in one subdirectory) and still have the rest of the files in both
branches?

Say, I have two subdirectories of a module, kernel and user-space,
where kernel contains linux kernel modules and user-space contains
user-space tools using these modules.

Now I need a branch in the kernel subdirectory for porting from
linux-2.4 to linux-2.6, where we will have lots of changes but the API
to user space doesn't change.  When I checkout the whole module I want
the user space tools included in both branches (i.e. the trunk and the
newly created branch) and I don't want to have to checkin all changes
to user space into both branches.  The same revisions of all files in
user-space should be on both branches.

When I create the new branch only for the files in the kernel
subdirectory, the user space tools will be missing in the new branch.
If I create the new branch also on all files in the user-space
subdirectory I will have to checkin all changes to these files
identically to both, the trunk and the new branch.  Is there a way to
avoid this?

urs