From: "Steven Rostedt (Google)" <rost...@goodmis.org> Sparse complains that function_trace_op is not static but is not declared in a header file. It is used only in assembly code. But add it to a header so that sparse no longer complains:
kernel/trace/ftrace.c:99:19: warning: symbol 'function_trace_op' was not declared. Should it be static? Signed-off-by: Steven Rostedt (Google) <rost...@goodmis.org> --- include/linux/ftrace.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h index 9f61556a9491..4135dc171447 100644 --- a/include/linux/ftrace.h +++ b/include/linux/ftrace.h @@ -1131,6 +1131,9 @@ extern void ftrace_graph_init_task(struct task_struct *t); extern void ftrace_graph_exit_task(struct task_struct *t); extern void ftrace_graph_init_idle_task(struct task_struct *t, int cpu); +/* Used by assembly, but to quiet sparse warnings */ +extern struct ftrace_ops *function_trace_op; + static inline void pause_graph_tracing(void) { atomic_inc(¤t->tracing_graph_pause); -- 2.43.0