Hi Randy,
Fix one typo (comma to semi-colon).
Fix sysfs externs (just use sysfs.h for prototypes).
Documentation/firmware_class/firmware_sample_firmware_class.c:37: error: conflicting types for 'sysfs_remove_bin_file'
include/linux/sysfs.h:100: error: previous declaration of 'sysfs_remove_bin_file' was here
Still has a build error:
ERROR: "firmware_class" [samples/firmware_class/firmware_sample_firmware_class.ko]
undefined!
while you are at it, can you also fix the broken coding style in it?