kernel/trace/fgraph.c:422: warning: No description found for return value of 'fgraph_get_task_var'
kernel/trace/fgraph.c:856: warning: No description found for return value of 'ftrace_graph_get_ret_stack'
kernel/trace/fgraph.c:892: warning: No description found for return value of 'ftrace_graph_ret_addr'
kernel/trace/fgraph.c:422: warning: No description found for return value of 'fgraph_get_task_var'
kernel/trace/fgraph.c:856: warning: No description found for return value of 'ftrace_graph_get_ret_stack'
kernel/trace/fgraph.c:892: warning: No description found for return value of 'ftrace_graph_ret_addr'