[Rtai] rtai_hal: Unknown symbol irq_desc (err 0)

[joe M]

Hello,

Both the vulcano repository and rtai-3.9-test2 have this warning. This
seems to be preventing the modules from loading with an
insmod/modprobe.

Excerpt from vulcano cvs repo:

make[6]: Entering directory `/home/j/dev/kernel/src/linux-2.6.38.8'
  CC [M]  /home/j/dev/kernel/src/rtai-cvs/vulcano/base/arch/i386/hal/hal.o
  CC [M]  /home/j/dev/kernel/src/rtai-cvs/vulcano/base/arch/i386/hal/rtc.o
  LD [M]  /home/j/dev/kernel/src/rtai-cvs/vulcano/base/arch/i386/hal/rtai_hal.o
  Building modules, stage 2.
  MODPOST 1 modules
WARNING: "irq_desc"
[/home/j/dev/kernel/src/rtai-cvs/vulcano/base/arch/i386/hal/rtai_hal.ko]
undefined!
  CC      /home/j/dev/kernel/src/rtai-cvs/vulcano/base/arch/i386/hal/rtai_hal.mod.o
  LD [M]  /home/j/dev/kernel/src/rtai-cvs/vulcano/base/arch/i386/hal/rtai_hal.ko
make[6]: Leaving directory `/home/j/dev/kernel/src/linux-2.6.38.8'

Excerpt from rtai-3.9-test2:

make[7]: Entering directory `/home/j/dev/kernel/src/linux-2.6.38.8'
  CC [M]  /home/j/dev/kernel/src/rtai-3.9-test2/base/arch/i386/hal/hal.o
  CC [M]  /home/j/dev/kernel/src/rtai-3.9-test2/base/arch/i386/hal/rtc.o
  LD [M]  /home/j/dev/kernel/src/rtai-3.9-test2/base/arch/i386/hal/rtai_hal.o
  Building modules, stage 2.
  MODPOST 1 modules
WARNING: "irq_desc"
[/home/j/dev/kernel/src/rtai-3.9-test2/base/arch/i386/hal/rtai_hal.ko]
undefined!
  CC      /home/j/dev/kernel/src/rtai-3.9-test2/base/arch/i386/hal/rtai_hal.mod.o
  LD [M]  /home/j/dev/kernel/src/rtai-3.9-test2/base/arch/i386/hal/rtai_hal.ko
make[7]: Leaving directory `/home/j/dev/kernel/src/linux-2.6.38.8'

When I do a modprobe:

modprobe rtai_hal
FATAL: Error inserting rtai_hal
(/lib/modules/2.6.38.8-rtai/rtai/rtai_hal.ko): Unknown symbol in
module, or unknown parameter (see dmesg)

dmesg | tail -2
[ 1501.786567] rtai_hal: Unknown symbol irq_desc (err 0)
[ 5822.432290] rtai_hal: Unknown symbol irq_desc (err 0)

Can you please help?

The only reason I tried vulcano/3.9-test2 is because the
kern/switches/.run testsuite would not run with 3.8.1. It just showed
me the last few lines of /var/log/kernel. Not sure if that is a known
issue.

Thanks
Joe