2.6.29-rcx triviality - How to have foo.ko module with same name as foo.c source file

[Boaz Harrosh <bharrosh@panasas.com>]

Since sometime in the 2.6.29-rc I'm no longer able to produce an
out-of-tree module that has the same base-name as a source file.

This is what I had in 2.6.28:
<Kbuild>
    obj-m += foo.o
</Kbuild>
Where foo.c is a source file in the same directory.

But since 2.6.29-rcx it will no longer build my foo.ko module. I
had to change it to:
<Kbuild>
    foo_mod-y = foo.o
    obj-m += foo_mod.o
</Kbuild>
Which changed my module name in scripts and packages.

[Q]
  Is it possible to build a module with exact same base-name as it's single
  source file?

P.S:
  Just asking I realized that I can just add an "mv ..." command to my make file.
  But is this expected behaviour?

Thanks in advance
Boaz