kernel/usermode_driver.c:62: warning: No description found for return value of 'umd_load_blob'
kernel/usermode_driver.c:84: warning: No description found for return value of 'umd_unload_blob'
kernel/usermode_driver.c:171: warning: No description found for return value of 'fork_usermode_driver'
Error: Cannot open file include/linux/usermode_driver.h
Error: Cannot open file kernel/usermode_driver.c