[DRBD-user] FC4 x86_64, kernel 2.6.15, drbd 0.7.15 compilation issues

[srinisan at fmailbox.com]

I noticed a similar issue posted for Linux kernel 2.6.14. It looks  
like it was even fixed. But I am having trouble with 2.6.15 on  
x86_64. Maybe I am making some newbie mistake. I'd appreciate any  
help to get past this issue. Thanks.

dmesg after trying to modprobe the module shows:
drbd: Unknown symbol register_ioctl32_conversion
drbd: Unknown symbol unregister_ioctl32_conversion

Here is the relevant part of make's output:
**BEGIN MAKE OUTPUT
/usr/src/drbd/drbd-0.7.15/drbd/drbd_main.c: In function âdrbd_cleanupâ:
/usr/src/drbd/drbd-0.7.15/drbd/drbd_main.c:1661: warning: implicit  
declaration of function âunregister_ioctl32_conversionâ
/usr/src/drbd/drbd-0.7.15/drbd/drbd_main.c: In function âdrbd_initâ:
/usr/src/drbd/drbd-0.7.15/drbd/drbd_main.c:1899: warning: implicit  
declaration of function âregister_ioctl32_conversionâ
   LD [M]  /usr/src/drbd/drbd-0.7.15/drbd/drbd.o
   Building modules, stage 2.
   MODPOST
*** Warning: "unregister_ioctl32_conversion" [/usr/src/drbd/ 
drbd-0.7.15/drbd/drbd.ko] undefined!
*** Warning: "register_ioctl32_conversion" [/usr/src/drbd/drbd-0.7.15/ 
drbd/drbd.ko] undefined!
   CC      /usr/src/drbd/drbd-0.7.15/drbd/drbd.mod.o
   LD [M]  /usr/src/drbd/drbd-0.7.15/drbd/drbd.ko
make[2]: Leaving directory `/usr/src/kernels/linux-2.6.15'
Memorizing module configuration ... done.
make[1]: Leaving directory `/usr/src/drbd/drbd-0.7.15/drbd'

         Build successful.
**END MAKE OUTPUT

Thanks