Worked on the sysprog21/lkmpg repository, focusing on resolving a critical issue in the IOCTL interface. Addressed incorrect data handling by updating the IOCTL_VALSET_NUM macro from _IOW to _IO, ensuring direct integer value passing and aligning with the project’s established IOCTL calling conventions. This change improved the consistency of the IOCTL interface throughout the codebase, reducing the risk of future regressions and simplifying ongoing maintenance. The work involved C programming and system programming skills, with careful attention to project standards and messaging updates to reflect the corrected behavior. No new features were added during this period, emphasizing targeted bug resolution.