storing printk message check sum

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http://www.linuxquestions.org – Dear all, Background : I want to store the printk message checksum in the dict field of structured log entry. What I tried : I have made a following changes in the printk.c file, Calculate the message checksum using crc32_le function in vprintk_emit function Append the checksum to the dict field update the dict_len Compile the source After the successful compilation, I restarted the machine but it didn't start booting now.. It just got stuck.. So, I'm not sure what went wrong? Any pointers or help is welcome... Thanks (HowTos)