where is the function "prussdrv_start_irqthread"?

[zhanglongqi]

From the API http://processors.wiki.ti.com/index.php/PRU_Linux_Application_Loader_API_Guide#prussdrv_start_irqthread
i can find the function "prussdrv_start_irqthread", but I can't find it from the code, So how I can make a interrupt handler in my C code which running in ARM.

[ipburbank]

It looks like this version of prussdrv is out of date. Until this is fixed, you can find the source as described here:
http://processors.wiki.ti.com/index.php/PRU_Linux_Application_Loader_API_Guide

[zhanglongqi]

you mean the document is for the old version of prussdrv, the newest version have no this feature?

[b2ag]

Just to put my two cents in I guess you won't see that function having a comeback. I think it's because of it's dependency to pthread and other surrounding framework functionality, which would make the whole library much more complex.
The source for the function though can be found there: http://pastebin.com/HMfK7evt
It's not worth much without the mentioned framework around it for which I couldn't find any sources.