include/linux/kref.h:63: warning: No description found for return value of 'kref_put'
include/linux/kref.h:110: warning: No description found for return value of 'kref_get_unless_zero'
include/linux/kref.h:63: warning: No description found for return value of 'kref_put'
include/linux/kref.h:121: warning: No description found for return value of 'kref_get_unless_zero'