systemtap with USB

[tsjaseen]

Hello,

I am trying with the systemtap tool to understand the USB subsystem. I've
written basic script where the probe point is set for usb_register_driver.

probe kernel.function("usb_register_driver")

{

print("Entering usb_register\n")

}

probe timer.ms(30000)

{

exit()

}

After executing this script i am inserting a USB flash due to which the
usb-storage module gets loaded. Checked by doing lsmod.

But the hook i've set here in the kernel is not getting the event at all.

Secondly, if i am setting the probe point for some other symbol exposed by
usb-storage module it gives the following error:

semantic error: no match for probe point while resolving probe point
kernel.function("....")

Please help me to resolve these issues.

FYI i am using FC8. kernel-2.6.23.1-42.fc8

Regards,

Jaseen
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