Clicking thru: http://lxr.linux.no/source/include/linux/udf_fs.h?v=2.6.0-test7#L46 tells me udf_debug prints the __FUNCTION__ which include/linux/kernel.h defines to mean gcc __func__, analogous to std. C __FILE__ and __LINE__. Pat LaVarre -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/